Full Idea
A single belief can trail at once regresses of both sorts: one terminating and one not.
Gist of Idea
A single belief can trail two regresses, one terminating and one not
Source
Ernest Sosa (The Raft and the Pyramid [1980], §6)
Book Reference
'Epistemology - An Anthology', ed/tr. Sosa,E. /Kim,J. [Blackwell 2000], p.141
A Reaction
This makes foundationalism possible, while admitting the existence of regresses. It is a good point, and triumphalist anti-foundationalists can't just point out a regress and then smugly troop off to the pub.