ERR

[Laurence Horn]

This, just arrived on a jokes list, suggests that the "ur"
pronunciation is still dominant.  The first two, at least, don't work
on "air", and it's significant that none of them require the "air"
version.
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To err is human; to purr, feline.

To err is human; two curs, canine.

To err is human; to do nothing, benign.

To err is human; to quit, resign.

To err is human; to howl about it, lupine.

To err is human; to solve it, design.

To err is human; to admit it, asinine.

To err is human; to moo bovine.
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larry