A little stupid question.

If you have a card ability that says corrupt a unit.........

Can you corrupt a already corrupted unit to trigger the effect?

If the effect doesn't specify that the target isn't corrupted, you can target an already corrupted unit with such an effect, but since it doesn't change states, it won't count as being corrupted. Example: You can target an already corrupted unit with Chillwind, but since it didn't get corrupted by Chillwind's effect, the part after "then" won't happen.

Thanks