There is no success or failure in Nature.

Dualism makes the problem insoluble; materialism denies the existence of any phenomenon to study, and hence of any problem.

There are clear cases in which "understanding" literally applies and clear cases in which it does not apply; and these two sorts of cases are all I need for this argument.

In many cases it is a matter for decision and not a simple matter of fact whether x understands y; and so on.

In the performance of an illocutionary act in the literal utterance of a sentence, the speaker intends to produce a certain effect by means of getting the hearer to recognize his intention to produce that effect; and furthermore, if he is using the words literally, he intends this recognition to be achieved in virtue of the fact that the rules for using the expressions he utters associate the expression with the production of that effect.

An utterance can have Intentionality, just as a belief has Intentionality, but whereas the Intentionality of the belief is intrinsic the Intentionality of the utterance is derived.

If you can't say it clearly, you don't understand it yourself