Here's what we can say about phrasal verbs:
* They are highly idiomatic: Their meanings are often not easily predictable from the individual words that make them up. For example, "look up" can mean "to search for information" or "to improve," while "look down on" means "to consider someone inferior."
* They are versatile: They can be used in a variety of ways, including transitively (with a direct object), intransitively (without a direct object), and even as prepositions.
* They can be complex: There are many different types of phrasal verbs, and some can have multiple meanings.
* They are constantly evolving: New phrasal verbs are constantly being created, and older ones are sometimes changing their meanings.
So, instead of thinking about a "conclusion," think about how phrasal verbs continue to add richness and complexity to the English language.
It's helpful to think of phrasal verbs as a living, breathing part of the language, not a static set of rules.