Full Idea
It might be wondered why we even have a concept of truth. The answer is that this concept is required for defeasible reasoning.
Clarification
Willingness to change is the mark of 'defeasible'
Gist of Idea
We need the concept of truth for defeasible reasoning
Source
John L. Pollock (Epistemic Norms [1986], 'Cog.Mach')
Book Reference
'Epistemology - An Anthology', ed/tr. Sosa,E. /Kim,J. [Blackwell 2000], p.214
A Reaction
His point is that we must be able to think critically about our beliefs ('is p true?') if we are to have any knowledge at all. An excellent point. Give that man a teddy bear.