Stu says: Logic is not like mathematics, physics or chemistry. These have universal constants that would be recognised by an alien species very different to ours (for instance H2O will be exactly the same on their plant as it is here). If these aliens were at the same technological level as us then they would have developed their own system of logic but this could be very different from human logic; we could share some of our rules of logic, but their system would be very, very different.

I don't think you're right on that, Stu. As far as I can see, the processes of logic should be universal. When one manipulates similar factors in similar ways and in similar conditions, they should have similar outcomes. Isn't that logical?

-Joe-