Quote:
Originally Posted by supernova1965
But if a tangible outcome can come from it don't we have to call it a fact.
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No. A theory is an explanation … ie: it describes 'how' something works.
Quote:
Originally Posted by supernova1965
I mean if it were wrong how could we use it to make something work 
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What if no-one knows, or can ever know, the 'truth' of how something works ?
Ie: there is no-one who knows the
actual truth about how something actually works.
How would you ever gauge whether the explanation was 'right' or 'wrong' ?
Science doesn't dabble in the truth of anything. People do … science says nothing about 'truth' of how something works. It provides an explanation which fits the observations and any known facts.
A theory's ultimate job is to make accurate predictions.
Cheers