I've understood your position from the beginning. However, repeating the same conditional sentence twice doesn't make it change.
Weird, so if you played Gain you'd only gain one Silver?
Gain
$5 - Action
--
If at least one Gain is in play, gain a Silver at the start of your Clean-up phase.
If at least one Gain is in play, gain a Silver at the start of your Clean-up phase.
Would Super Highway decrease card costs by 1 or 2?
Super Highway
$7 - Action
+1 Card
+1 Action
--
While this is in play, cards cost $1 less, but not less than $0.
While this is in play and the Copper stack is not empty, cards cost $1 less, but not less than $0.