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“The general method that Wittgenstein does suggest is that of ’shewing that a man has supplied no meaning for certain signs in his sentences’.
I can illustrate the method from Wittgenstein’s later way of discussing problems. He once greeted me with the question: ‘Why do people say that it was natural to think that the sun went round the earth rather than that the earth turned on its axis? I replied: ‘I suppose, because it looked as if the sun went round the earth.’ ‘Well,’ he asked, ‘what would it have looked like if it had looked as if the earth turned on its axis?’
This question brought it out that I had hitherto given no relevant meaning to ‘it looks as if’ in ‘it looks as if the sun goes round the earth’.
My reply was to hold out my hands with the palms upward, and raise them from my knees in a circular sweep, at the same time leaning backwards and assuming a dizzy expression. ‘Exactly!’ he said.”
The Great Depression was originally thought to be due to the inherent instability of capitalism. Later Friedman and Schwartz blamed it on a big drop in M2. Their view is now more popular, because it has more appealing policy implications. It’s a lot easier to prevent M2 from falling, than to repair the inherent instability of capitalism. Where there are simple policy implications, a failure to do those policies eventually becomes seen as the “cause” of the problem, even if at a deeper philosophical level “cause” is one of those slippery terms that can never be pinned down. [Bold added]
Here's the new thread for posting quotes, with the usual rules: