"Why 'of course'?"
"I can't explain exactly, but you know perfectly well that it's always warmer on a cold day after the rain."
"Yes, but not on a hot day."
"Yes, it is."
"No, it isn't."
"It is, really. Anyhow, this is a cold day."
"No, it isn't. You said it was very hot at A."
"I'm not going to argue. You must take it from me that rain generates heat."
"All right. Is it fine then?"
"No. Heat being generated the air rises. The result of that is that there is less pressure at A—"