W: (n) inference [Related to: infer] (the reasoning involved in drawing a conclusion or making a logical judgment on the basis of circumstantial evidence and prior conclusions rather than on the basis of direct observation)
W: (n) derivation [Related to: derive] (a line of reasoning that shows how a conclusion follows logically from accepted propositions)
S: (v) derive (come from) "The present name derives from an older form"
S: (v) derive, educe (develop or evolve from a latent or potential state)
S: (v) derive, come, descend (come from; be connected by a relationship of blood, for example) "She was descended from an old Italian noble family"; "he comes from humble origins"