In the realm of reasoning and logic; also called common sense, an argument is a disagreement or a mode of reasoning wherein a set of statements mean to establish a definite proposition while logic serves as the means to evaluate the quality of ratiocination applied within the argument as to determine whether the conclusion reached proves valid, or not.
If we want to insist upon what we assert as true, then, reasonably, we *must* show true. If we cannot, then we can do no other to put the assertion(s) down as either opinion or induction, at best.
There's only two ways to (dis)prove something: by (empirical) evidence and (deductive) argument.
Sufficient empirical evidence is often quite hard, if not impossible, to come by due to the nature of the means we are using here to communicate; a forum, basically letters behind a screen.
Leaves us mainly with deductive argument.
A deductive argument that is valid and sound always produces a true conclusion. Such an argument is considered to be proof - due to its intrinsic (axiomatic) nature - since it cannot (logically) be refuted.
Always try to keep in mind the distinctive differences between: - inductive (inconclusive) and deductive (conclusive) argument - (circumstantial) evidence and (established) proof
Note also that reasoning as the method and logic as the tool to scrutinize the method serves as a self-correcting system - when applied correctly that is.
So, there's only two ways to (dis)prove something: by conclusive evidence (Empirical Demonstrable Proof) and by deductive argument (Logically Sound Proof), either seperately or combined.
The mode to do so is by means of what is known as "the chain".
In order to produce C; the thing to be (dis)proven, we need to do so
A : in an unbroken (thus logically valid) chain of establised facts/events
B : by eliminating all other possibilities (therefore rendering a remaining argument sound)
When not A and B, no C.
May all your arguments be sound
-it is not what you (think you) know that matters, it is what you can show true that does
after all, truth is demonstrably fact and fact is demonstrably true - everything else ... mere opinion-