Full Idea
If anything is to be probable, then something must be certain.
Gist of Idea
If anything is to be probable, then something must be certain
Source
C.I. Lewis (An Analysis of Knowledge and Valuation [1946], 186), quoted by Robert Fogelin - Walking the Tightrope of Reason Intro
Book Reference
Fogelin,Robert: 'Walking the Tightrope of Reason' [OUP 2004], p.6
A Reaction
Lewis makes this comment when facing infinite regress problems. It is a very nice slogan for foundationalism, which embodies the slippery slope view. Personally I feel the emotional pull of foundations, but acknowledge the very strong doubts about them.