We don't have a good theory for time.
So we can't extrapolate with confidence how things would behave when time is manipulated in a way whose analogue we have not witnessed before.
One notion is the causality relationship that defines time is nothing but an artifact of our cognition conditioned by our perception. If there is no true causality, then there is no causality paradox of shooting your grandfather before your father was born. But since time has never been manipulated by us before in a way that would reveal the nature of the limitations of perception of causality, we assume causality is real and can't be broken.
So we can't extrapolate with confidence how things would behave when time is manipulated in a way whose analogue we have not witnessed before.
One notion is the causality relationship that defines time is nothing but an artifact of our cognition conditioned by our perception. If there is no true causality, then there is no causality paradox of shooting your grandfather before your father was born. But since time has never been manipulated by us before in a way that would reveal the nature of the limitations of perception of causality, we assume causality is real and can't be broken.
