Episteme, as distinguished from techne, is etymologically derived from the Ancient Greek word ἐπιστήμη for knowledge orscience, which comes from the verb ἐπίσταμαι, “to know”. In Plato‘s terminology episteme means knowledge, as in “justified true belief“, in contrast to doxa, common belief or opinion. The word epistemology, meaning the study of knowledge, is derived from episteme. http://en.wikipedia.org/wiki/Episteme
Episteme became Epistemology, which became Science.
Epistemology (i/ɨˌpɪstɨˈmɒlədʒi/; from Greek ἐπιστήμη, epistēmē, meaning “knowledge, understanding”, and λόγος,logos, meaning “study of”) is the branch of philosophy concerned with the nature and scope of knowledge and is also referred to as “theory of knowledge”. http://en.wikipedia.org/wiki/Epistemology
There are other types of knowledge as far as the ancient greeks are concerned.
“Techne” is a term, etymologically derived from the Greek word τέχνη (Ancient Greek: [tékʰnɛː], Modern Greek: [ˈtexni] ( listen)), that is often translated as “craftsmanship”, “craft”, or “art”.http://en.wikipedia.org/wiki/Techne
Phronesis (Ancient Greek: φρόνησις, phronēsis) is a Greek word for a type of wisdom or intelligence, which is a common topic of discussion in philosophy. http://en.wikipedia.org/wiki/Phronesis
Gnosis is the common Greek noun for knowledge (in the nominative case γνῶσις f.). In Christian, Islamic, or Jewish mysticism, mystery religions and Gnosticism gnosis generally signifies a spiritual knowledge or “religion of knowledge”, in the sense of mystical enlightenment or “insight”. Gnosis taught a deliverance of man from the constraints of earthly existence through insight into an essential relationship, as soul or spirit, with a supramundane place of freedom.http://en.wikipedia.org/wiki/Gnosis
The fact of the matter is people don’t walk into walls because they believe that they are solid. You can debate all you want, belief informs action. People act on what they believe. Justified, True, Belief is a rhetorical tautology of peer review, that which can be agreed to exist or to be true. To disagree with the most scientific definition of knowledge is silly.
“A piece of knowledge is never false or true – but only more or less biologically and evolutionary useful. All dogmatic creeds are approximations: these approximations form a humus from which better approximations grow.” (Ernst Mach)