Test failure (Check if generated files are up to date) is build failure of python3.13 ./Tools/build/generate_sbom.py with messageRemoteDisconnected("Remote end closed connection without response"). Seems like random failure; rerunning the one test. EDIT: rerun passed.

Thoughts:

• There isn't a real issue here. Python has a bunch ofis... predicates and people seem to get that they all return booleans. AFAICT no actual user has ever had a problem with knowing that any these methods return a boolean.

• Some of the predicates likestr.isupper are worded in the form "Return True if ..., False otherwise". Others likeisinstance are worded in the form "Return whether ...". Either form seems to suffice.

• It would be step backwards to replace "another set contains this set" with "if the set is a subset of other." The latter is a circular definition and add no value. Consider possible docstrings foris_coprime(p, q). One says "returns True if p is coprime to q". Another says "Returns True is p has no factors in common with q". One just repeats the functions name and the other teaches you something about what it does.

• If some change has to be made, then let's address an actual user problem. I've seen confusion about whetherp.issubset(q) means thatp is a subset ofq or whether it means thatq is a subset ofp. That said, I think the confusion is intrinsic to the word order of the call itself. So there isn't much than can be done. Thankfully, people mostly just use thes < t notation which is unambigous.