And there is the implicationI don't think command logically implies ability, as none of us can keep the Law of God, yet all of us are commanded to keep it.
However, there are other verbal cues along with a command that would be dishonest if ability were not implied.
For example anything that implies actual expectations from a command is dishonest if the commander knows it is impossible.
The Nature and justice of God makes it so
Regarding the law we are clearly told of the impossibility to earn righteousness by law
regarding commands to believe or repent we are not told it is impossible and men have done so