We had an instance where a character used Influence>Control and it failed. How long before he can use it again? "No these REALLY aren't the droids you are looking for." Or should he even be able to? Maybe just say this mind is too strong for you and you can never try to influence it.
It was out of combat in an extended discussion. Time really wasn't a factor.
Which leads me to the question, in situations where time is not a factor and retries are fine, can we assume a character gets max on rolls for basic powers like Sense, Seek, and Move and a power like Influence>Control? If not when they fail when can they retry?