So I noticed that many cards with tap-effects ship with a clause specifying that they can only be used on untapped permanents, such as Earthcraft and Crackleburr.
So here's my question:
Doesn't that imply that, given the right situation, one can legally tap an already tapped permanent?
I'll give an example of the kinda scenarios this is relevant for: Can Tamiyo, the Moon Sage activate her first ability when no untapped cards are around? Or, thinking untap-effects, could I bounce a forest with Scryb Ranger even when there isn't a tapped creature available?
Notice that, unlike the previous batch of examples, the wording on these lacks the clause restricting their use to un/tapped permanents - does that mean that they aren't?
Any kind of clarification would be greatly appreciated here.