I learned that one way to form a "must" sentence is "negative verb + conditional + ダメ・ならない・いけない":
I mainly see two kinds of conditional used - the 仮定形 and と. For example
食べないとダメだ。
食べなければダメだ。
Then I thought, since と expresses a conditional that 100% will happen, like "if you drop an apple, it falls", does this mean that "must" sentences created with と express a stronger "must" than those created using the 仮定形?