Full Idea
The fundamental question that must be answered by any acceptable version of foundationalism is: how are basic beliefs possible?
Clarification
'Basic beliefs' are those needing no further justification
Gist of Idea
The big problem for foundationalism is to explain how basic beliefs are possible
Source
Laurence Bonjour (Externalist Theories of Empirical Knowledge [1980], §I)
Book Reference
'Epistemology: Internalism and Externalism', ed/tr. Kornblith,Hilary [Blackwell 2001], p.11
A Reaction
This question seems to be asking for a justification for basic beliefs, which smacks of 'Who made God?' Look, basic beliefs are just basic, right?