– – “What does the word ‘exactness’ mean? Is it real exactness if your are supposed to come to tea at 4.30 and come when a good clock strikes 4.30? Or would it only be exactness if you began to open the door at the moment the clock begins to strike? But how is this moment to be defined and how is “beginning to open the door” to be defined? Would it be correct to say, ‘It is difficult to say what real exactness is, for all we know is only rough approximations’?”)
5).   Question and answer: A asks, “How many plates?” B counts them and answers with the numeral.