Four-sided tins
The great man Pythagoras was also fond of food.
That square meals into round tins could never go,
Was what he did conclude.
From this he surmised…
That if his supper emerged from a four-sided tin,
He could rest assured, all his RDAs would be found therein.
Ergo, corn(er)ed beef and Spam must be the ultimate in square meals.
Which only proves the limitations of logic, no matter how much it (and Spam!) appeals.