The most misleading assumptions are the ones you don't even know you're making.

I refuse to answer that question on the grounds that I don't know the answer

Structural linguistics is a bitterly divided and unhappy profession, and a large number of its practitioners spend many nights drowning their sorrows in Ouisghian Zodahs.

They wouldn’t even lift a finger to save their own grandmothers from the Ravenous Bugblatter Beast of Traal without orders signed in triplicate, sent in, sent back, queried, lost, found, subjected to public inquiry, lost again, and finally buried in soft peat for three months and recycled as firelighters.

I can see we're in for a fabulous evening's apocalypse.

For instance, on the planet Earth, man had always assumed that he was more intelligent than dolphins because he had achieved so much—the wheel, New York, wars and so on—whilst all the dolphins had ever done was muck about in the water having a good time. But conversely, the dolphins had always believed that they were far more intelligent than man—for precisely the same reasons.

He shifted his weight from foot to foot, but it was equally uncomfortable on each.