If there really were a rigid distinction between precipitate and precipitous, he wouldn't need to condemn the purported ignorance of those who ignore it.

That purpose would be defeated by a rigid distinction between different stages of the same litigation.

Dualism maintains a rigid distinction between the realms of mind and matter.

While no rigid distinction exists between consumer speakers and studio monitors, manufacturers more and more accent the difference in their marketing material.

They'll include some or all of the purportedly rigid distinctions between disinterested and uninterested, imply and infer, anticipate and expect, flout and flaunt, and refute and deny.