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Full Idea
The link between time and modality was severed by Duns Scotus, who proposed a notion of possibility based purely on the notion of semantic consistency. 'Possible' means for him logically possible, that is, not involving contradiction.
Gist of Idea
Scotus based modality on semantic consistency, instead of on what the future could allow
Source
Michal Walicki (Introduction to Mathematical Logic [2012], History B.4)
Book Ref
Walicki,Michal: 'Introduction to Mathematical Logic' [World Scientific 2012], p.13