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... the problem would be that I don't know how find accurate information. I was wondering if there are any technichs (real bad sp) for extracting fact from fiction.
Yes, there are indeed many techniques to tell the difference between truth and statements that have no basis in reality.
Ask yourself if that's the only way it can happen. Could something else have caused that which is being overlooked? Is it more complicated than the way it is being presented? And always remember, a fundamental principle of logic is that when one makes an assertion it is their sole responsibility to prove that the assertion is true. Whoever is hearing the proposition has no logical burden.
As such, if someone say "Dragons are as large as a football field", then s/he should explain how this creature could exist. Beware of simple arguments like "lung filled with lighter than air gas make it possible" (how many balloons filled with helium would you need to just lost 20 lbs?). If the person doesn't explain then the claim has no value at all and it's better to be too cautious in accepting something as true than the opposite.
Also, while knowledge is useful (as always), I personally don't think it's something bullets-proof against a good debater. For example, someone saying
"Since you cannot prove that ghosts do not exist, they must exist" (Appeal to ignorance) or
"We shouldn't allow stem cells and genetic research because this will result in eugenism. It will lead to human modifications and results in a society were the have will rule supreme on the have-not" (Slippery slope). A good debater could see the logical flaw in such argument even if s/he has very little knowledge on the subject. A debater may not know exactly what is the right answer, but s/he know for sure that the other person is using fallacies to prove his/her point (and in turn, this is an evidence that the person is trying to ram down a personal opinion down your throat).
This is something you can learn in a philosophy/debate class. Reading about various scientific fields coupled with a basic knowledge in debate (in order to help you recognize and identify fallacies) and you will have all what is needed to tell the facts from fiction.