Eavesdropping
We were in a pub having a drink before it was time to go into the restaurant for the meal we had booked. A middle aged couple came and sat at the table next to us. Their body language suggested that they didn't know each other very well, although I can't be sure that observation wasn't influenced by hindsight. Upon sitting, the first words spoken came from the man, and the words were, "I'm not really a lawyer". He did go on to give an explanation of some sort, but it was hard to hear what he was saying and we left our table soon after they arrived. This happened fifteen to twenty years ago, or thereabouts.
I know what I thought the background to his comment was, but I thought it might be interesting to get other theories, although I suspect most will coincide with mine.
JBR's Philosophical thread prompted this one, btw.