Full Idea
That 7+5=12 and that carrots are nourishing are mutually consistent, but do not exhibit coherence.
Gist of Idea
Maths may be consistent with observations, but not coherent
Source
Robert Audi (Epistemology: contemporary introduction [1998], VII p.192)
Book Reference
Audi,Robert: 'Epistemology: a contemporary introduction' [Routledge 1998], p.192
A Reaction
This shows how difficult it would be to define 'coherent'. Is 'carrots are nourishing' coherent with 'fish are nourishing'? Is the battle of Hastings coherent with the battle of Waterloo?