> You can deliberately cause severe inconsistencies...
No, you can't. Whatever it turns out you do already happened. You're assuming that being in the past means you can somehow "change" it, which is incoherent nonsense.
As David Lewis pointed out [1], the idea that self-consistency in the face of time travel requires some kind of "thwarting" of your actions by "the universe" is just a poor (and unnecessary) plot device employed by some science fiction authors. You should read up on Novikov self-consistency [2]. Read the Lewis paper too, it doesn't require a physics background and will illuminate the heart of the matter. See in particular the discussion on compossibility.
Come on, just humor me. Following my first example, why couldn't I visit my younger self and give him my life research? What physical law could possibly prevent us from working together and building a second time machine in a few years, thus guaranteeing a paradox?
I understand why I shouldn't be able to accidentally cause a paradox, but if I know how to cause one and have the means to do it, and the universe is mindless, what could stop me?
Stephen Hawking posited that the first and only thing a time machine would do is detonate as a direct consequence of virtual particles reaching arbitrarily high energy density through repeated loops. If you don’t like various chronology protection conjecture, fair enough, but building a time machine means something unless you’re inserting magic into it.
Our universe appears to lack the necessary extreme curvature or negative mass to sustain CTC’s. In the absence of such natural curvature or means to create it artificially and stabilize it, the whole question is a non-starter.
No, you can't. Whatever it turns out you do already happened. You're assuming that being in the past means you can somehow "change" it, which is incoherent nonsense.
As David Lewis pointed out [1], the idea that self-consistency in the face of time travel requires some kind of "thwarting" of your actions by "the universe" is just a poor (and unnecessary) plot device employed by some science fiction authors. You should read up on Novikov self-consistency [2]. Read the Lewis paper too, it doesn't require a physics background and will illuminate the heart of the matter. See in particular the discussion on compossibility.
[1] https://www.csus.edu/indiv/m/merlinos/paradoxes%20of%20time%...
[2] https://en.wikipedia.org/wiki/Novikov_self-consistency_princ...