[Wittgenstein] was committed to absolute honesty.  Nothing–nothing at all–was to be allowed to escape analysis.  He had nothing up his sleeve; he had nothing to teach.  The world was to him an absolute puzzle, a great lump of opaque pig iron.  Can we think about the lump?  What is thought?  What is the meaning of ‘can’, of ‘can we’, of ‘can we think’?  What is the meaning of ‘we’?  What does it mean to ask what is the meaning of ‘we’?  If we know the answer to these questions on Monday, are the answers valid on Tuesday?  If I answer them at all, do I think the answer, believe the answer, know the answer, or imagine the answer?