Does 'if you do' wording on cards require the action to fully resolve and produce its result, or just the decision to attempt the action?

Ruling: To fulfill an "if you do" condition, you must fully perform the exact action described. Making the choice to perform an action is not sufficient if the action does not fully resolve.

Nuances:

• If you choose to ready an already ready unit, this does not fulfill an "if you do" condition because the action cannot be fully performed
• In the hypothetical example, choosing to kill a gear that is then saved by another effect would not fulfill "if you do" because the gear did not actually die