I agree with your maths nerd, because
if 1/0 = null
then for a real number x
null/x = 1/(0*x) = null, so null = x * null
if x = 0
null = 0 * null = 0 * 1/0 = 0/0
ie. 0/0 != 1
but according to waf, if 0/0 exists it should be 1 (and I believe him)
so as the maths nerd says it's still...