Lady Bracknell, sacred cattle & fast food

We make no claim to the saying that 'sacred cows make great hamburger'. A Google search provided a number of sources including Mark Twain but suprisingly not Oscar Wilde. The latter's seminal contribution to drug discovery is Lady B's observation that one carboxylate may be regarded as unfortunate but two looks like carelessness. May we suggest that this henceforth be known as 'The Rule of Two'.