'Truth' is an abomination. It once meant facts, but it has gradually become some almost mystical, vague, indefinable place-holder for something not-entirely-god but a close approximation of a mythical Absolute.

Facts exist, when supported by strong evidence. But then, that is science, not philosophy. And scientific fact is always held with a margin of doubt, because the possibility of the evidence being misinterpreted or false is recognized. 'Truth' doesn't exist, except as a general, common term for 'generally accepted evidence-supported fact'.

But capital 'T' truth is a lie. There never was any Truth beyond the masturbations of philosophers and theologians, and the arbitrary choice of those unable to accept approximate understanding as the best anyone can ever hope to get.

Truth in the philosophical sense cannot exist. It is an arbitrary, extremely fuzzy term, a variable into which any person can pour whatever they need to justify. More atrocity, horror, and disappointment have come from capital 'T' Truth than any other single fictional invention of Man.

There can be no 'Truth', there never was. Of course Blackburn finds searching for truth to be futile - it is the same as searching for god, another arbitrary, invented thing with no evidence and nothing besides human imagination behind its creation.