The burden of proof lies with the person making the claim. Whether or not something is easily confirmable

Check out greenshot. Has a built-in editor that’s great for quick stuff like this

An iterable is just something that can be iterated over, like range(10), or [1, 2, 3].

A sequence on the other hand is a Collection that is reversible.

https://docs.python.org/3/library/collections.abc.html#collections-abstract-base-classes

That’s cool but I’m ashamed to say a lot of my enthusiasm died when I reread it and saw that it said beasts