[hoorayimhelping]

>I don't think there is such a thing as truth

This is a self-defeating statement. It's false on its face. If there is no such thing as truth, then this statement can't be true because it would mean there is at least one truth.

[gadflyinyoureye]

Not really. It’s a hyperbolic statement. It needs to be understood as such.

Normally this falls into the realm of moral truth. Or perhaps in a broader sense existential truth. For example: rape is wrong is not an absolute truth. It’s just like your opinion man.

In an entirely materialistic system morality is not universal. It merely the taste of whatever society wants at a time. Morality is ultimately might makes right. If you can enforce your morality through force, your morality wins. If the pro-rape camp could enforce their view, within a few generations we’d all say that the anti-rape camp was on the wrong side of history.