There is a proverbial saying chiefly concerned with warning against too closely calculating the numerical value of un-hatched chicks.
Neil GaimanAmy: This time can we... lose the bunk beds? The Doctor: No Bunk beds are cool, a bed with a ladder, you can't beat that!
Neil GaimanHe had noticed that events were cowards: they didn't occur singly, but instead they would run in packs and leap out at him all at once.
Neil Gaiman