Regarding the role that language plays in our lives, consider this from Ray Monk’s biography of Ludwig Wittgenstein:
[b]In his lectures, Wittgenstein ridiculed [the] concern for ‘hidden contradictions’, and it was to this that Turing voiced his most dogged and spirited dissent. Take the case of the Liar’s Paradox, Wittgentstein suggested:
‘It is very queer in a way that this should have puzzled anyone—much more extraordinary than you might think: that this should be the thing to worry human beings. Because the thing works like this: if a man says ‘I am lying’ we say that it follows that he is not lying, from which it follows that he is lying and so on. Well, so what? You can go on like that until you are black in the face. Why not? It doesn’t matter.’
"What is puzzling about this sort of paradox, Turing tried to explain, is ‘that one usually uses a contradiction as a criterion for having done something wrong. But in this case one cannot find anything done wrong.’ Yes, replied Wittgenstein, because nothing has been done wrong: ‘One may say, “this can only be explained by a theory of types.” But what is there that needs to be explained?’
"Turing clearly needed to explain, not only why it is puzzling, but also why it mattered. The real harm of a system that contains a contradiction, he suggested, ‘will not come unless there is an application, in which case the bridge may fall down or something of the sort.’
In the following lecture, he returned to the fray, and almost the entire lecture was taken up with a debate between the two on the importance of discovering ‘hidden contradictions’:
'Turing:
You cannot be confident about applying your calculus until you know that there is no hidden contradictions in it.
Wittgenstein:
There seems to me to be an enormous mistake there. For your calculus gives certain results, and you want the bridge not to break down. I’d say things can go wrong in only two ways: either the bridge breaks down or you have made a mistake in your calculation—for example you multiplied wrongly. But you seem to think there may be a third thing wrong: the calculus is wrong.
Turing:
No. What I object to is the bridge falling down.
Wittgenstein:
But how do you know that it will fall down? Isn’t that a question of physics? It may be that if one throws dice in order to caulculate the bridge it will never fall down.'[/b]
I suppose it is pointless to ask: who is right? Pointless, perhaps, because, as Wittgenstein seems to suggest [to me], in trying to align our language with What Is True we find over and again that words aren’t always suited to the task. Here, in other words, we are dealing with intricacies of human biology and consciousness…with logic and epistemology and psychological states and philosophical analysis and linguistics. We soon find ourselves becoming hopelessly ensnared in a semantic and syllogistic hell.
On the other hand, someone might say, “I am a murderer”. Now he is either lying or he is not. He either did murder someone or he did not. Here, in fact, things tend to become problematic only when when someone says, “John is a murderer”, and then, when asked for confirmation, says, “John performs abortion in a Planned Parenthood clinic”. So, is he a murderer? Or, perhaps, another possible problematic context is when someone says he is a murderer and actually believes he is even though he has murdered no one. He lives his life, however, as though he were, in fact, a murderer. He repents, turns himself in to the police etc. This illustrates the sometimes puzzling gap between reality as it exists and reality as we think it exists [and say it exist in language]. It’s importnat to note because many, many times what counts regarding our behavior [behavior that carries very real consequences] is what we believe is true, not necessarily what can be demonstrated to actually be true.
In any event, when someone says “I am a liar” and does not reference that to any particular circumstantial context, the context becomes the words themselves. They don’t refer to any actual bridge or actual murder, do they? We can’t either validate or falsify his contention because it is entirely self-referential. It is in his head. It is the linguistic equilvalent of a house of cards.
But this is surely related in turn to what Wittgenstein meant by embracing silence regarding the relationship between language and aesthetics and ethics and religion. There are, however, philosophers who create deductions about such values and they duel with the deductions of other philosophers. They think they are saying something substantial about human moral interactions when, instead, the interactions are really only revolving around the internal logic of the conceptual assumptions themselves.
They are, it might be said, not really about bridges staying up or falling down at all. Except as they are constructed out of words.