Full Idea
Nowhere in the sensible world could you find anything to be suitably labelled 'or' or 'not'. So the abstractionist appeals to an 'inner sense', or hesitation for 'or', and of frustration or inhibition for 'not'. Personally I see a threat in 'or else'!
Gist of Idea
'Or' and 'not' are not to be found in the sensible world, or even in the world of inner experience
Source
Peter Geach (Mental Acts: their content and their objects [1957], §7)
Book Reference
Geach,Peter: 'Mental Acts: Their content and their objects' [RKP 1971], p.23
A Reaction
This is a key argument of Geach's against abstractionism. As a logician he prefers to discuss connectives rather than, say, colours. I think they might be meta-abstractions, which you create internally once you have picked up the knack.