Was it the Homo sapiens that tripped you up genius? Maybe you haven't covered that in school yet, which then I would owe you an apology otherwise what I said is all correct. Saying that you aren't very bright isn't an insult it's an observation.
Well guess you are doubling down. Your original claim was that humans a bipedal mammals here:
a bipedal primate mammal (Homo sapiens)
Then I said what about kangaroos? here:
A kangaroo is a bipedal primate mammal.
Then you moved the goalposts to something that was not your original claim:
Kangaroos are marsupials.
So basically you have moved the goalposts and you have based differences not on something real instead you base it on classification. That is not an argument and for you to say that really goes to show what you are capable or incapable of.