3 ms·

I had no idea that's where 'primer' came from!

• CRConrad 4y ago
  > I had no idea that's where 'primer' came from! It isn't. That was the GP either misunderstanding or, perhaps more probably, making a pun. The usage here is this sense of the word: https://en.wikipedia.org/wiki/Primer_%28textbook%29 https://en.wikipedia.org/wiki/Primer_%28textbook%29 (Then again, maybe your comment was just a way of saying "ISWYDT!" to the GP?)