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When I see "experiment X backs up/supports/proves conclusion Y" in a headline I always mentally correct it to "experiment X does not definitively disprove conclusion Y" where X and Y are random variables operating on whatever the actual scientific experiment and conclusion respectively are.

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In fairness, the way even the most firmly established scientific theories get firmly established is precisely by having a lot of experiments done that fail to disprove them.

(Disclaimer: That's a bit of a simplification. In practice the acceptance of a theory also has something to do with how explanatory the theory feels, how elegant it is, what prejudices the highest-status experts have, etc.)

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