Originally Posted by
Singu
Well we're going to need answers to the question of "why?", because only explanations are capable of generating universal answers, while observations are only local information.
For example, we don't just observe a bird flying and say, "Only birds, or only something like birds are capable of flying". Only someone who was curious enough to find the answer to "Why do birds fly?" was capable of coming up with the theory of aerodynamics. We could correlate many traits of birds with flying, such as 1. It must have feathers. 2. It must be light and small 3. It must flap its wings... etc, in order to fly. And it is true that all of those things are included in the theory of aerodynamics of what can cause flight, but they're only a very small part of many other things that could fly, like the Boeing 747 that is made of steel, weighs 300 tons and does not flap its wings. So the theory of aerodynamics is a universal theory, because it's a theory that contains universal, abstract explanations to the questions of "why?", and not observations. It contains every possible things that can cause flight, even things that have never been observed or categorized. It also tells us what's not possible.
If there are observable differences among Ti vs. Te types, and it's true that there are differences, then... why? Why would they be different? Perhaps it is likely, like the theory of aerodynamics, that once some underlining theory has been found, the "source" of Ti and Te are going to be the same, but they're just slightly different expressions of it.