"a contains b" can mean b is an element of a or b is a subset of a

ty

Contemporary Abstract Algebra by Joseph A. Gallian. Specifically I found an example where he uses it both ways in the same sentence.
>Determine the smallest subring of Q that contains 1/2. (That is, find the subring S with the property that S contains 1/2 and, if T is any subring containing 1/2, then T contains S.)
It's not confusing in this case but fuck it, I just wanted to shitpost.

>Every textbook I've seen uses it for subset.
That's weird. If I had to choose one I'd say it makes more intuitive sense to say "{a,b} contains a" than "{a,b} contains {a}."

The interval [-1,1] contains 0. Are you stupid?

no, but {a} would be :^)

>a + b can mean addition in the field of reals, or addition in the integers depending on whether a and b are in Z or R
why is this allowed?

why are frogposters almost universally stupid?

It's a self-perpetuating phenomenon. From the time Pepe got really popular (around 2014 I'd say) most frogposters were varying shades of retarded, probably a large part of them originated from /r9k/. The people that see this connection between stupidity and frogposting don't want to make themselves look dumb by posting frogs. The people that don't understand and turn into frogposters themselves are the ones that were idiots from the start.

THAT'S NOT THE SAME

TAKE YOUR PEDOPHILE CARTOONS BACK TO

Because they're almost universally from /pol/, and the few exceptions to that rule are from /r9k/, where the angry frog originated.

Not really. I hated pepe but like everything spammed by idiots I just got desensitized, but idiocy isn't exactly limited to any one board.