What are puesudo pawns?!It doesn’t make sense!


Pseudo?
https://www.chessprogramming.org/Pseudo-Legal_Move
Just a wild guess. Where did you see them referenced?
Which lesson?
the lessons he just took.
maybe cooking.
sometime the effort people take to make themselves understood is just amazing.

I've never actually heard the term "pseudo pawn" in chess, but it is possibly an alternate name for a term I already know. I know "Pseudo" means "Fake" so my educated guess is either:
1) a pawn which doesn't really change anything such as a doubled pawn which is blocked by a friendly pawn and can't advance or
2) a "faker pawn" as described in Kmoch's book Pawn Power in Chess. A Faker Pawn is an enemy pawn which is positioned a Knights-jump-distance from your pawn and is on an adjacent file to that pawn. A white pawn on d4 may have an enemy faker on c6 or e6.

Never heard of "pseudo" Pawns.
There are a few chess openings that include that word, though.
The Pseudo-Tarrasch in the QGD, for example. Or the Pseudo-Dutch in the Nimzo.