What is the remedy for missing a trigger that requires no choices?

When a player misses a trigger that requires no choices, the appropriate remedy is to assume that the trigger resolved at the appropriate time. This is because triggers that don't require choices, such as damage triggers or whenever a creature enters the battlefield, are considered to have clear and straightforward effects that wouldn't cause confusion over their resolution. The proactive step taken here ensures that the game state is preserved as if the trigger had occurred naturally.

This approach maintains the integrity of the game and allows the players to continue without pause or disruption, reflecting the spirit of the game that encourages smooth play. In contrast, opting for other remedies like issuing a warning or applying a penalty does not align with the nature of such straightforward triggers and could unnecessarily complicate the situation.