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by fallingmeat 1173 days ago
Just tried this with ChaGPT for giggles. It spit out words, but I wouldn't call it sound reasoning.

__user__:

- A system in composed of two elevators. - Each have their own unique velocity parameter. - At each time step in the system, the elevators can move up or down a number of floor equal to their velocity, or change their velocity. - Assume that both elevators move at the same time step. - The elevators may never occupy the same floor.

- Elevator A starts on floor 11, and Elevator B at floor 3. - Both elevator velocities start at 1.

Is it possible for A to ever reach floor 2?

__assistant__:

No, it is not possible for Elevator A to ever reach floor 2 while maintaining the rule that the two elevators may never occupy the same floor.

To see why this is the case, note that Elevator A starts at floor 11 and Elevator B starts at floor 3. Since both elevators move at the same time step, Elevator A can never move to a floor lower than Elevator B without violating the rule that they may never occupy the same floor.

Furthermore, since Elevator A and Elevator B have the same velocity at the start and Elevator B is already on a lower floor, Elevator B will always reach any floor below Elevator A before Elevator A can get there. This means that Elevator A can never occupy any floor that is below the current position of Elevator B, including floor 2.

Therefore, it is not possible for Elevator A to ever reach floor 2 while maintaining the given constraints.

__user__:

what if at the first time step, both velocities became equal to 5?

__assistant__:

If both elevators have their velocities set to 5 at the first time step, then it is possible for Elevator A to reach floor 2.

With both elevators moving at velocity 5, Elevator A will reach floor 6 after the first time step, while Elevator B will reach floor 8. Since Elevator A is now on a lower floor than Elevator B, it is possible for Elevator A to continue moving down to floor 2 without violating the constraint that the elevators may never occupy the same floor.

Specifically, Elevator A can continue moving down at velocity 5, reaching floors 1 and 2 after two more time steps. Elevator B, with velocity 5, will reach floor 13 after the same two time steps.

So, if both elevators have their velocities set to 5 at the first time step, then it is possible for Elevator A to reach floor 2 while maintaining the given constraints.