I saw that Jonathon Ross interview too.
It was also in the Telegraph on saturday.
I think what he was getting at is, where the loch ness monster is impossiblem there is literally no real proof either way with Yeti type creatures.
Yes, that is the impression I got. He was comparing the Loch Ness Monster (for which we would expect to see some real evidence, given its accessible location, size of the loch and kind of animal we are looking for) with the Yeti (with a vastly more remote location, large unexplored area and much smaller proposed animal).
They don't have to be white hairy man like beasts, but something could exist that we dont know of up there of considerable size in order to leave the evidence such as seeming footprints etc.
Fair point, we could be talking about something like a new species of bear.