§ Continuum TTRPG
Events don't conspire. People do. Events can't conspire, and people can . Causality is not a renewable resource. If a time machine could be constructed, it would be married to the trend of instant gratification.
§ Fragging
Sentient force must be applied to undo sentient damage --- time combat.
§ As/As not
At this moment, anything is possible.
Causality is only one principle and psycohology essentially cannot be exhausted by causal methods only.
§ Blending in with levellers
Anthropologists in the field have noted that to be accepted as a native to a place, one has to be born there. No matter how well you behave, or how welcome a part of the com- munity you become, it will be remembered that you came from outside. A curious exception to this was observed by anthropologist Charles Ward, working in the 1950s: If one leaves the community, and then returns after a distinct absence, one is then welcomed much as a returning native. This can be seen as a norm in most human cultures, as long as the person returning was looked upon favorably when they left.
§ Tipler Cylinder
A Tipler cylinder, also called a Tipler time machine, is a hypothetical object theorized to be a potential mode of time travel—although results have shown that a Tipler cylinder could only allow time travel if its length were infinite or with the existence of negative energy.