Learning from our interactions with others

I have a friend who is still an active mathematician.I don’t whether he did it on purpose but he replied to  some  emails
That figures
I reckon so.
Then I realised these are words  originally relating to arithmetical calculations became part of ordinary speech in a metaphorical way.
Again, the phrase,
There is no accounting for taste
uses a word accounting still used by people who deal with money but also used in a metaphorical way.
So this proves we can learn not just from books or lectures but from everyday speech if we are on the lookout.