Asking an ASIC designer to create a 2-input XOR gate out of 2-input NAND gates is like asking a programmer to write a bubble sort. If someone asked me either on

Asking an ASIC designer to create a 2-input XOR gate out of 2-input NAND gates is like asking a programmer to write a bubble sort. If someone asked me either one, despite being 38 years out of college, I'd do it without being offended.