Because what confuses me is that it sounds like a person is supposed to do anything they can to find out if something is wrong,...
Yes, that is exactly what scientists try to do, prove a theory wrong. The reason for this is simple; there's no way to prove a theory right. No matter how much a theory explains or how powerful the predictions it makes, it might always be incorrect. There is always the possibility that more evidence will be found that invalidates a theory, or someone may come up with a better explanation for the same evidence. And the best way to find that potential contradictory evidence is to challenge theories. In addition, the more challenges a theory survives, the stronger it is considered.
...then if something is wrong then it calls the entire body of work into question.
It's actually considerably more complicated than that. The first step when seemingly contradictory evidence is found is to see if the theory can be modified to accommodate the new evidence. This happens all the time. I would venture to guess that no significant theory has ever remained completely unchanged from its first inception to the present time. There's also the possibility that the new evidence is actually incorrect. But in essence you are correct. If there is verifiable evidence that a theory cannot account for, that does call into question the entire body of work. Because a theory that cannot be reconciled with all the evidence obviously has something wrong with it.
Because if that was the way science truly work, then how can there be any progress, since, anybody with enough skill can find something wrong with some part and turn it against the body of work?
That's why an idea that has been accorded the status of a theory is very highly regarded in science. A theory is a comprehensive explanation of a broad body of evidence that nobody has been able to find anything wrong with. A scientific theory is not simply a guess that someone has made.
For this kind of thing I am keeping in mind the general practice of Creationists who do this kind of thing.
Well, with very few exceptions, the things that creationists think are problems with the Theory of Evolution are not problems at all. Often the things they say are simply factually incorrect. Most of the rest of it consists of things that creationists just don't understand, so they think they are problems.
Ridicule is the only weapon which can be used against unintelligible propositions. Ideas must be distinct before reason can act upon them; and no man ever had a distinct idea of the trinity. It is the mere Abracadabra of the mountebanks calling themselves the priests of Jesus. -- Thomas Jefferson
For we know that our patchwork heritage is a strength, not a weakness. We are a nation of Christians and Muslims, Jews and Hindus -- and non-believers. -- Barack Obama
We see monsters where science shows us windmills. -- Phat
It has always struck me as odd that fundies devote so much time and effort into trying to find a
naturalistic explanation for their mythical flood, while looking for
magical explanations for things that actually happened. -- Dr. Adequate
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