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Full Idea
Overt contradictions include formal contradictions of form 'B and not B', but I also take them to include 'This is red all over and green all over' and 'This is red and not coloured'.
Gist of Idea
Contradictions include 'This is red and not coloured', as well as the formal 'B and not-B'
Source
Ian Rumfitt (Logical Necessity [2010], Intro)
Book Ref
'Modality', ed/tr. Hale,B/Hoffman,A [OUP 2010], p.36