Monday, October 28, 2013

Carnap: Metaphysics is Meaningless!

Carnap, in "The Elimination of Metaphysics through Logical Analysis of Language", argues not just that the claims of ethics are false but that they are meaningless. 


In a definite language, a word designates a concept. We get meaningless words when a word loses its old meaning and does not acquire a new one or when a word is just introduced not having a meaning. The meaning of a word is made up of two things: a fixed syntax for that word and fixed conditions for verifying the truth or the falsehood of the elementary sentence for that word. The elementary sentence is the sentence that fixes the syntax for a word, or specifies how that word is to be used in a sentence. For example, "X is a stone" is the elementary sentence for stone, as it indicates that nouns are stones. That 'stone' is the category of word that applies to nouns. Once we have the elementary sentence, we should be able to determine what other sentences are deducible from that sentence.  

Some sentences of metaphysics are meaningless because they have meaningless words in them.  Others are meaningless because they are formed either counter-syntactically or because they contain type confusion or type errors.  Contrast "I has and cheeseburger" with "Kobe is a right angle".  In the first sentence, words are arranged in a grammatically incorrect way.  The sentence is meaningless because it is counter-syntactically formed.  In the second sentence, the words are not in violation of the official rules of grammar, but the kind of predicate applied to Kobe is the wrong kind of predicate.  Carnap thinks that in addition to word categories like predicate, copula, etc., we need further sub-categories.  For example, there are some predicates that are appropriate to apply to humans (e.g., a man, a basketball player, a rapist) and others that are not (a right angle, a prime number, a breath of fresh air).  

Perhaps uses of the second kind can have metaphorical associations, but that's just not scientific meaning, according to Carnap

Tuesday, October 8, 2013

The Big Bright Green Pleasure Machine

In this song from Simon & Garfunkel, the narrator attempts to sell a device that leads to a pleasure-filled life.  How might this song provide a thought experiment to show that utilitarianism is wrong?

Felix and the Problem of the Greatest Happiness Principle

This comic from Saturday Morning Breakfast Cereal involves a thought experiment that serves as a counterexample to Utilitarianism.

Proof of the Greatest Happiness Principle

Mill's Proof of the Greatest Happiness Principle.
(1) if you see something, this proves that it is visible.
(2) Similarly, desiring something proves that it is desirable.
(3) The only thing that each person truly desires is happiness.
(4) The only thing that is truly desirable for a person is his or her own happiness.
(5) Hence each person should perform the actions that promote the greatest happiness.

Three Problems with this Argument:
First,  (2) does not follow from (1).  Visibility and desirability are not the same kinds of things.
Second,  (4) does not follow from (3).  To assume that we can derive an "ought" from an "is" is to make the naturalistic fallacy, which is a point made by David Hume.
Third,  (5) does not follow from (4).  Just because your own happiness is desirable does not mean that the happiness of other people is also desirable.

Further Objections to Utilitarianism:
(1) We cannot always predict what the consequences of our actions will be.  It is difficult if not impossible to judge the morality of an action based on what the predicted consequences will be.
(2) It is difficult to quantify pleasures.  In other words, it is hard to represent pleasures with numbers in order to determine if happiness will be maximized by an action. Cost-benefit analysis is difficult if not impossible.
(3) Also, the process of trying to determine if an action will maximize happiness is time-consuming and difficult.  It is not practical that we will be able to do such a calculation before we perform an action.
(4) Utilitarianism cannot explain special duties or obligations that we have to people like our friends, family and neighbors.
(5) If we only care about sum total happiness, then there will be actions that are good while these actions do cause a great amount of pain for some people.  For example, say that six of the seven dwarves decide to torture, beat and murder the Dopey for fun.  Even though Dopey experiences a lot of pain, utility is still maximized because the other dwarves are so happy.  Thus a utilitarian must say that it is good for the dwarves to murder Dopey.
(6) Utilitarianism fails to respect individual rights.  The rights of a single person can be violated as long as the greatest good is still maximized.
(7) Utilitarianism does not address the question of what kind of a person we should be.  The focus is entirely on consequences rather than the character of people.  For example, if I am offered a job as an assassin, I might think that killing people for a job would be OK because even if I do not take the job, someone else will.  This means that whether or not I am an assassin, the consequences are the same, hence the moral value of either choice is equal.
(8)  Pain is either entirely subjective (meaning that it does not exist) or perhaps pain is a good thing itself.



The first three objections do not attack the theory but rather the practice of the theory.  Objections (1), (2) and (3) are all objections that the theory is impractical and difficult (if not impossible) to use as a way of making moral decisions.  Objections (4), (5), (6), (7) and (8) object on the grounds that the results of utilitarian theory will conflict with strong moral intuitions or other reasons to consider when deciding if an action is good or bad.

Monday, October 7, 2013

Intro to Utilitarianism

Now we turn to normative philosophy. Normative means that instead of just concerning what is the case, we are talking about what should be the case.  A normative claim is a claim that asserts that things should be a certain way.  Contrast a normative claim with a descriptive claim, which simply asserts that things are a certain way.  e.g. "Natalie Portman was really thin in Black Swan" is a descriptive claim because it simply describes, whereas "Natalie Portman was too skinny in Black Swan" is a normative claim because there is also a judgment made about the state of affairs being described ("too skinny" implies that it was wrong that Natalie was so thin in the film).  To say that a claim or a theory is normative is also the same as calling is prescriptive.

Ethics is one arena of normative philosophy.  A goal of ethics is to tell us what we should do.  There are a number of different approaches to the question of how we determine if an action is morally desirable.  First, we can determine if an action is moral if the motive or the purpose of the action is good.  Second, we can ask whether a certain rule or maxim has been followed by the action.  Third, we can consider the results and consequences of the action and ask whether these results and consequences are good.  This lecture focuses on the third approach, which we call consequentialism.

John Stuart Mill is a great example of a classic consequentialist.  His view in particular is called utilitarianism.   Utilitarianism is the view that in order to determine if an action is good or bad, we must look at the consequences of the act.  Specifically, we must ask whether we can expect the action to give us utility.  Utility is very similar to happiness.  A thing has utility if it causes us more happiness and pleasure than pain and sadness.  In short, utility is net happiness (the happiness left over after we take away all the unhappiness).  Mill's utilitarianism is not an egocentric or self-centered view.  One must not just look at the consequences for oneself; one must also consider the consequences for other people.  Utilitarianism thus requires that we have expectations about the consequences of our behaviors.  Although we may not know the consequence until we act, we must consider the consequences that we do expect to happen.  In short, what makes an action moral is to maximize net expectable utility.  Actions are good if they tend to promote the greatest good for the greatest number of people.

One objection to utilitarianism might be that it excludes the happiness or utility of animals from being relevant to moral considerations.  Someone might think that it is not enough that an action promotes the good of human beings.  Someone might think that we must also consider whether an action promotes utility for animals.

Greatest Happiness Principle: The greatest end or goal is to achieve the absence of pain and to maximize the quality and quantity of our happiness.  We perform all actions in order to achieve this goal (this is a descriptive claim about what motivates our action).

Mill thinks that actions are right if they promote happiness and that actions are wrong if they promote pain or the lack of happiness (this is a normative claim that asserts that what is moral is what promotes happiness; Mill derives a moral normative claim from his psychological descriptive claim).  In other words, if an action multiplies happiness then that action is good.

Happiness is used as a technical term in Mill.  Happiness means pleasure.  Mill talks about two kinds of pleasure, or enjoyment.  Sometimes, he is talking about a kind of mental state, such as being happy or thinking that chocolate cake tastes really good.  Other times, he talks about actions or activities that are likely to produce such pleasant mental states.  Sven call pleasures that are mental states "subjective pleasures" and he calls pleasures that are activities or actions "objective pleasures".

Happiness is measured in two ways: quality (how good of a pleasure is it) and quantity (how much pleasure is there).  Quantity is measured by how many people experience the good.  We can also measure quantity by how long a pleasure lasts or how many time the pleasure is experienced.  Quality can be measured in two ways.  First, we can use a democratic method of determining which pleasures are better; the more people who think a pleasure is desirable, the better the pleasure is.  For example, if more people think that eating ice cream is more desirable than eating bananas, then eating ice cream is a higher (better) good.  Second, Mill thinks that pleasures that involve using our minds and our rational thinking are higher (better) than pleasures that only involve sensation.  For example, using our reasoning skills to solve a math problem is a higher pleasure than eating ice cream.

Mill's Utilitarianism is a Universalism.  This just means that we must consider the happiness of all people.  This means that it is not enough just to consider consequences for our friends, families and neighbors.  Rather, we must consider the consequences for all humans.  Moreover, we must give equal weight to the utility (net happiness) of all people.  This universalistic dimension of Mill's utilitarianism is indicative of the social justice issues that concerned Mill.

Mill thought that social reform could be motivated by utilitarianism.  In the time in which he lived, he noted that happiness was not possible for everyone because the education systems and other social institutions were terrible.  He wanted to create political change that could make happiness possible for even the lowest classes of people.  He thought that disease could be eliminated through sanitation and education.  Mill also thought that poverty could be eliminated by private charity and public welfare.  He also thought that the higher pleasures of the mind should be encouraged by social institutions such as education.

We can sum up Mill's view in four main theses:

Consequentialism: whether an action is right or wrong is determined by the consequences of that action.
Hedonism: we do seek and should seek happiness.  Utility is net happiness (the happiness that is left over after we subtract out our pains).
Maximalism: a good or right action produces the highest number of good consequences and the fewest number of bad consequences.
Universalism: we must give equal weight to the consequences for all people.

Motive vs. Intention. On the one hand,  Mill thinks that our motive is irrelevant to whether an action is good or bad.  Even if we want to do good, our action can still be morally bad if the consequences are bad.  While the motive is unimportant to determine moral worth of actions, Mill thinks that intention is important to determine moral worth of an action.  Motives may be used to determine if a person himself or herself has moral value, but the action is only good or bad if the consequences are good or bad.  On the other hand, intention is relevant to the morality of an action.  Intention is what a person wants to do by an action.  In other words, an intention is just what consequences a person is trying to achieve by his or her actions.  A motive is a feeling about why I want to do something whereas an intention is the consequences that I hope to bring about by my action.  For example, if I bring in ice cream for all my friends, my intention is to provide my friends with ice cream,  This intention is relevant.  However, my motive is irrelevant; it does not matter if my motive is to make my friends happy or if my motive is to manipulate my friends by buying them ice cream.

Ends in Themselves

A good will is not a means to an end.  It is an end in itself.  Humans, insofar as we are defined by our good will (good practical reason), are also ends in ourselves.  A human is not to be used as a means to an end.  Kant imagines a kingdom of ends, where humans agree to abide by common law.  Because each person can legislate universal law by using his or her practical reason, each person is able to hold power over herself and others in a mutually consenting manner.  This power to legislate universal morality is what Kant calls the autonomy of the will.

Perfect and Imperfect Duties, Hypothetical and Categorical Imperatives

An imperative is the form that a command takes.  Imperatives are a grammatical category of statements.  Examples of imperatives include, "Please don't smoke here.", "Stop being racist.", and "Always act in such a way that your personal rule can be made a universal law."  This last imperative is the categorical imperative.  To say it is categorical just means to say that it is necessary and universal.  We can contrast categorical imperatives with hypothetical imperatives.  A hypothetical imperative is one that we need not follow necessarily and universally.  We only have a hypothetical duty if there is some other goal we have in mind.  For example, if a rational person wants to be happy, then they probably like being benefited by others (rather than have people interrupt their way of life or be harmful towards them).  Kant thinks there is an imperfect duty to benefit others if we want to be happy.  There is not a categorical imperative to perform this action because it pasts the test of the categorical imperative (it is logically possible to universalize a law that says not to benefit other people).  But if we want to be happy, then it seems like the same reasons that we are made happy will also apply to other people.  It is rationally consistent to benefit others if you like to be benefited by others.

There is also a hypothetical imperative to cultivate your own talents and skills.  Hypothetical imperatives lead to imperfect duties.  To say that we have a hypothetical imperative to cultivate our talents just means that we have an imperfect duty to cultivate our talents.  Imperfect duties are neither necessary nor universal.  Perfect duties, however, are necessary and universal.

Just as there are two imperfect duties that Kant talks about, there are also two perfect duties that Kant talks about.  First, there is a perfect duty to preserve your life.  In other words, the categorical imperative would forbid suicide.  If you want to kill yourself because you think it is good for you, then your will is self-contradictory because if you are dead, NOTHING is good for you.  In order for something to be good for you, then you must be alive.  Second, there is a perfect duty to keep promises/never to lie.