I should have been more precise-
I wrote "The Grandfather paradox and the whole idea of the past remaining in the space-time continuum, and for that matter a preordained future already within the space time continuum is utterly abhorrent and needs to be shown as the falsehood that it is." Perhaps I should have written 'past [concrete event itself]..and preordained [concrete future] already ......'
Data within the light remains after the event from which Image reality manifestations (observed/experienced reality) can be formed. Even so, actualised concrete objects can not be constructed from received light. They are a different category of reality. So past events themselves ie the configurations of concrete elements of Object reality are not within the hypothetical space-time continuum or the pool of electromagnetic potential sensory data. And can not be visited by time travel. The arrangements of matter and particles that were the source event may go onto form other relationships in the uni-temporal Object universe.
I have just read today about a scientist who has spent his life since age 11 trying to build a time machine to warn his dad of a heart attack. He is using lazer rings to try and create disturbances in the space-time continuum , even obtaining large sums of money to pursue a feasibly study of his goals.Scientist building a time machine Unfortunately this kind of research is misguided, due to the inbuilt category error, that I point out, not having been identified.
It also doesn't alter time ( it seems from the article that the scientist's hypothesis is that it is space-time 'Out there' and so disturbing space is also disturbing time).I disagree. It is uni-temporal space within which there is potential sensory data giving space-time output when processed. Evidence for that being that that allows the barn pole type and Andromeda paradoxes to be fully intuitive and Grandfather paradox to be negated without contrived prohibition rules or many worlds world line jumping.