sure as eggs is eggs

Alternative forms

 * as sure as eggs are eggs
 * as sure as eggs is eggs
 * sure as eggs are eggs

Etymology
Possible corruption of "x is x", a statement equivalent to the mathematical expression x = x, or the phrase "A is A" in relation to the law of identity.

Adverb

 * 1)  Most certainly.
 * At this time of year, sure as eggs is eggs, the TV starts filling with Christmas ads for toys.