Full Idea
Fichte thought that everything that involves necessary truths - even mathematics and logic - should be shown to follow from the more basic principles involved in assertion and negation.
Gist of Idea
Necessary truths derive from basic assertion and negation
Source
report of Johann Fichte (The Science of Knowing (Wissenschaftslehre) [1st ed] [1794]) by Terry Pinkard - German Philosophy 1760-1860 05
Book Reference
Pinkard,Terry: 'German Philosophy 1760-1860' [CUP 2002], p.116
A Reaction
An interesting proposal, though I am struggling to see how it works. Fichte sees assertion and negation as foundational (Idea 22017), but I take them to be responses to the real world.
Related Idea
Idea 22017 Normativity needs the possibility of negation, in affirmation and denial [Fichte, by Pinkard]