Science is not really about one study, that's a media issue. It's much more about can that study be reproduced, or how do other studies confirm or deny its findings. A scientist should assume that any single study can be wrong via any number of possible mistakes. This is why experiments are endlessly reproduced. Reproducing confirms the finding and validates the science, or doesn't confirm and brings the science into question.
Also, the media is hopelessly attracted to soft sciences like psychology, sociology, and economics, and not so concerned with hard sciences such as bio, chem, and physics where more stringent methodology is used.
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