If time travel were real and allowed for interaction with one's past or future self, it would introduce a range of complex and intriguing possibilities. However, the exact nature and consequences of such interactions would depend on the specific rules or mechanics of time travel in that hypothetical scenario.
In some fictional depictions of time travel, meeting or interacting with one's past or future self can lead to paradoxes and logical inconsistencies. One well-known example is the "grandfather paradox," where a person travels back in time and somehow prevents their own birth, thereby creating a contradiction. Resolving such paradoxes requires the introduction of alternative timelines or multiverse theories.
Alternatively, some interpretations of time travel suggest that the past is fixed and unchangeable, meaning that any interactions with one's past self would be futile or predetermined. This viewpoint implies that any attempt to alter the past would ultimately fail, as the events would already have occurred as they did.
On the other hand, if time travel allowed for alterations to the past, it could have profound implications for causality and the flow of events. Interacting with one's past self might create branching timelines, where each decision made in the past leads to a different future, thereby avoiding paradoxes.
Ultimately, the rules governing time travel and interactions with past or future selves would depend on the underlying principles of time travel in that hypothetical scenario. Since time travel remains purely speculative at present, the nature of such interactions is largely a subject of creative imagination rather than scientific understanding.