An oddity in list comparison and element assignment

[Slawomir Nowaczyk]

On Thu, 01 Jun 2006 13:40:34 -0700
michael.f.ellis at gmail.com wrote:

#> Scott David Daniels wrote:
#> > Would you say that envelope containing five $100 bills is equal to
#> > an envelope containing five $100 bills with different serial numbers?

#> Yes (unless I was testing the assertion that the second envelope did
#> not contain counterfeits of the first)

So, what if Bank of America later decided that bills with serial
numbers containing "7" are no longer valid?

In other word, *if* you assume equality must be preserved by future
modifications, than no two different (modifiable) objects can ever be
really equal.

-- 
 Best wishes,
   Slawomir Nowaczyk
     ( Slawomir.Nowaczyk at cs.lth.se )

I believe that math illiteracy affects 7 out of every 5 people.