Here lies a major problem of evolution. Its called defenitions which are used to show an assumption.
Nothing about the nested hierarchy of life is assumed.
Those are observable facts. And it's easily testable as well.
Our classification system litterally is just pasting labels on all those groups. It doesn't matter what we call them. They are there. We just name them so we can talk about them, refer to them,... You know how language works, yes?
We are defined as primates because we are,defined as,primates.
No. What defines us as primates are our physical attributes. The facts about our biology. Yes, we categorize life. We use groups wich are actually just nodes on the branching tree of life. Off course, we have to figure out what the groups are, first.
The fact that we can actually do this, is quite ironically,
because life happens to fall into a nested hierarchy. Did it ever occur to you to wonder why the classification of life is in kind of an ever-specialising structure?
Eukaryote - Animal - Tetrapod - Mammal - Primate - Homo
And I'm probably skipping a lot of them as well.
Therefore the assumption is that we have a common ancestor as the monkey because They are primates too. Its a self fulfilling prophecy. Its an assumptive prophecy.
It's not. It's a conclusion from data.
I don't care what science defenition is placed on me I am not a monkey and never have been related to,one by ancestry.
Ow goody... an emotional argument.
This cannot be proven. We see no monkeys evolving into people today. Why?
Because we've already branched off of the monkey tree. In great, when did that happen? Did anyone observe it? No it is assumed it happened
Such events of the past have observable impact on the data in the present.
The "were-you-there" answer or variants thereof is absurd.
because we believe in a theory for which something has never been observed or tested.
That is a straight up lie.