Full Idea
Technical work on logical consequence has either focused on proofs, where validity is the existence of a proof of the conclusions from the premises, or on models, which focus on the absence of counterexamples.
Gist of Idea
Logical consequence needs either proofs, or absence of counterexamples
Source
JC Beall / G Restall (Logical Consequence [2005], 3)
Book Reference
'Stanford Online Encyclopaedia of Philosophy', ed/tr. Stanford University [plato.stanford.edu], p.6