trope. Hinting on something that could be done, but can't be done it THIS walkthrough because of previous player decision. Also, giving a hint that can help you advance when you are failing.
- In Russian game Space Rangers, in text adventures sometimes option is displayed, but inactive. Instruction for quest editor suggest using this feature for giving advice to player, for example use inactive option "Go and remind referee that you bribed him" so player would know what would happen if he bribe said referee in the first day of sport event.