evidence! We perform an experiment, and it gives us evidence. We perform more experiments, and they give us more evidence. We can connect the dots of evidence and come up with a theory. A But there can be competing theories to explain the evidence As we gather more evidence... .we can eliminate the demonstrably incorrect theories All theories make assumptions.... ...but those that make fewer assumptions are more likely to be true. So we tend to focus on the theory with the fewest assumptions. This allows us to get as accurate a picture as we can. Our Theory The Truth It may not be completely accurate, but it's closer than the competing explanations.
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