Full Idea
Contrary to what Hume supposed, it must be possible for the premises of an argument to support a conclusion without logically entailing it.
Gist of Idea
Premises can support an argument without entailing it
Source
comment on David Hume (Enquiry Conc Human Understanding [1748]) by J Pollock / J Cruz - Contemporary theories of Knowledge (2nd) §1.2
Book Reference
Pollock,J.L./Cruz,J: 'Contemporary Theories of Knowledge (2nd)' [Rowman and Littlefield 1999], p.9
A Reaction
This seems to me an extremely important point, made with nice clarity. It is why people who are good at logic are not necessarily good at philosophy. The latter is about thinking rationally, not following the laws of deduction.