Is composition associative? Check!
Associativity for <= seems a bit weird to me; generally you want the value inside of () to be comparable outside; but (1 <= 2) <= 3 would result in True <= 3. So I think the best way to think of associativity here is that it just does not apply, and the () can be dropped.
All you need to do is click on what is interesting. This is a special trait of this website - by Writing in hypertext, it is structured for both you and I to explore my thoughts. In a linear piece of writing, all ideas would be sequenced into one narrative. In my hypertext writing, the narrative is emergent and the ideas are associative.
A fascinating way to structure and describe a website.