Why can't I xor strings?

Andrew Dalke adalke at mindspring.com
Wed Oct 13 21:10:03 CEST 2004

>     str1 != str2 and (str1+str2) == (str2+str1)
> I guess I'd better stop here because I can't actually _prove_ the last
> one of these actually implies one of the strings is empty but I can't
> find counterexamples either...!-)

str1 = "a"
str2 = "aa"

				dalke at dalkescientific.com

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