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This copy[1] has md5 of 6d62f3c0a63242a318ddd691d3974cd2.

[1]: http://uberty.org/wp-content/uploads/2016/02/Dr_Catarina_Dut...

Why do you share the md5sum of your copy?

So others can confirm that they got the same thing.

I understand that md5sums help you know you got the same copy. Why not share his resource directly instead? Also, what if someone gets the same resource "Formal Languages in Logic: A Philosophical and Cognitive Analysis" under a different md5sum (for example, the format or edition is different)? It seemed somewhat useless in this case.

Thanks. I love this subject. Any other recommendations not on the list? Favorites on the list?