It has been argued, however, that the Cheshire Cat was an invention of Carroll's, and, furthermore, that the Alice specimen was the only Cheshire Cat known certainly ever to have existed. Because of this, the cat could, indeed, have had a grin and the meaning could, therefor, be the plain meaning of the text.

insel, you're weird! I love it! Oh, convolutions within convolutions! And guess what, tsuwm? Here is
empirical evidence of the first known "nonce cat"!