Argument. An argument is a set of claims that is structured such that some of those claims (known technically as premises) are offered in support of another (known technically as the argument’s conclusion).
Conclusion. The conclusion of an argument is the arguer’s main point, or the thing of which they are trying to convince you.
Critical thinking. Critical thinking is the systematic evaluation or formulation of beliefs or statements by rational standards.
Premise. The premises of an argument are the claims offered in support of the argument’s conclusion.