Full Idea
Not only is traditional philosophy incapable of discovering the foundations it seeks, but the philosophical enterprise may itself dislodge the contingent, de facto supports that our daily life depends upon.
Clarification
'De facto' means 'in actual fact' (as opposed to 'according to the rules')
Gist of Idea
Philosophy may never find foundations, and may undermine our lives in the process
Source
Robert Fogelin (Walking the Tightrope of Reason [2003], Ch.2)
Book Reference
Fogelin,Robert: 'Walking the Tightrope of Reason' [OUP 2004], p.67
A Reaction
In the end Fogelin is not so pessimistic, but he is worried by the concern of philosophers with paradox and contradiction. I don't remotely consider this a reason to reject philosophy, but it might be a reason to keep it sealed off from daily life.