<< Empirical facts are those known through experience, as opposed to
> a priori facts like 2+2=4, known in some other way. There may
> also be a contrast with a theoretical fact, a fact derived from
> the structure of a theory. If that is a valid contrast, the
> constant velocity of c is a theoretical rather than a merely
> empirical fact. --jks
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What's a non-experience? What is this other way?
Ian
> >>
Well, unless you are a Millean about math and logic, we don't know mathematical and logical truths through experience. And if you think there are a priori philosophical truths, such as that time, space, abd causality are necessaty conditions of knowledge, or every effect has a cause, then you might think these are derived from nonempirical sources. --jks