Terence Mckenna denounces relativism

[Parsons]

This is actually an anti-scientific argument masquerading as a scientific one. By the that I mean he is discounting data for the sheer reason he finds it 'patently absurd', which is simply his own personal bias. It is quite ironic this is his position because most of the ideas he supports are patently absurd to most of the scientific community. So he is actually eroding his own position with this little speech.