Full Idea
Two conceptions of logical consequence: a substitutional account, where no substitution of non-logical terms for others (of the right syntactic category) produce true premises and false conclusions; and model theory, where no interpretation can do it.
Gist of Idea
Consequence is truth-preserving, either despite substitutions, or in all interpretations
Source
Kathrin Koslicki (The Structure of Objects [2008], 9.3.2 n8)
Book Reference
Koslicki,Kathrin: 'The Structure of Objects' [OUP 2008], p.243
A Reaction
[compressed]