> what do you remember...

Nuthink, I am afraid, Miss ~ my edumification was probably scandalously remiss in such structural post-facto analysis.

Since it still means little to me now apart from Jackie and Bill's clues, my lookup tells me this:

The topic sentence is a sentence that sets out the main idea or topic of a paragraph. It is often the first sentence especially when arguing a point where it may well be followed by further information, examples etc.. If the writing is exploring a point, it frequently comes as the last sentence, drawing a conclusion from the argument.

http://www.usingenglish.com/glossary/topic-sentence.html

It seemed a pretty clear description without being overly precriptive about positioning and so on - what think others?