Who says “Contrariwise, if it was so, it might be; and if it were so it would be; but as it isn’t, it ain’t”

The answer to the crossword question of “Who says ‘Contrariwise, if it was so, it might be; and if it were so it would be; but as it isn’t, it ain’t’ is Tweedledee“. Tweedledee is a fictional character who appears in Lewis Carroll’s classic children’s book “Through the Looking-Glass“. He is one half of a pair of identical twins known as the “Tweedledum and Tweedledee“, who are most famous for their nonsensical conversations and riddles. This particular quote by Tweedledee is an example of Carroll’s unique brand of humour, in which he toys with logic and language to create witty and memorable lines.