Actually, if you include List-Unsubscribe-Post, then you MUST include List-Unsubscribe (both).

According to https://www.rfc-editor.org/rfc/rfc8058#section-3.1,

A mail sender that wishes to enable one-click unsubscriptions places one List-Unsubscribe header field and one List-Unsubscribe-Post header field in the message. The List-Unsubscribe header field MUST contain one HTTPS URI. It MAY contain other non-HTTP/S URIs such as MAILTO:. The List-Unsubscribe-Post header MUST contain the single key/value pair "List-Unsubscribe=One-Click".

I'm not familiar with this term "arguments" used like this. Isn't this more referring to the motivation for this game?

Seems like "and" would be a better choice there. Both self and dependencies must be so restrictive.

If you're designing a web app, you still have hover.

I think this:

However, those descriptors gave a bit too much flexibility/dynamism to the class shape in order to be efficiently optimizable.

means:

However, because those descriptors were gave so much too much flexibility/dynamism to the class shape, it could not be be efficiently optimized.

rather than:

In order to be efficiently optimizable, those descriptors gave much flexibility/dynamism to the class shape.

In other words that flexibility/dynamism hindered optimization; it wasn't for the purpose of optimization (as "in order to be" could be interpreted as).

The "too much" wording also contributed to the confusion for me.

But maybe just dropping "in order" would have been enough for me:

However, those descriptors gave a bit too much flexibility/dynamism to the class shape to be efficiently optimizable. or However, those descriptors gave a bit too much flexibility/dynamism to the class shape for them to be efficiently optimizable.

I really need an example of this!

It seems unusual that they specifically mention "a grammatical case or form". I've never seen a definition before that is anything like this one.

How is this different from definition 1?

What does "work" mean here? I think maybe they mean to bypass profiling?