Full Idea
Frege makes a notorious claim that what is intuitable is not communicable.
Gist of Idea
Intuitions cannot be communicated
Source
report of Gottlob Frege (Grundlagen der Arithmetik (Foundations) [1884], §26) by Tyler Burge - Frege on Apriority (with ps) 4
Book Reference
Burge,Tyler: 'Truth, Thought, Reason (on Frege)' [OUP 2001], p.382