How to make all objects unable to be dropped only stored

Authoring Inform 7
1

So instead of making an elaborate code that would say what way the light is coming from im just gonna make it so the lantern can’t be dropped with all other objects so can someone tell me how to do that

2

You can use check rules to forbid certain actions.

check dropping:
	say "You can't drop anything in this game." instead;
3

If you want “drop all” to function normally while excluding the lamp from “all,” maybe something like this would do:

Rule for deciding whether all includes the lamp: it does not.

4 
Instead of dropping the lamp: say "It's fastened to your vest so that you can't lose it."
Instead of inserting the lamp into something: try dropping the lamp.
Instead of putting the lamp on something: try dropping the lamp.
Rule for deciding whether all includes the lamp when dropping: it does not.
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