Indeed, someone could give the command to jump to the moon in order to prove that we can’t do that, so I agree that a command does not imply ability, but it would be completely pointless to do that and we would not be at fault for failing to do that. Yes, we can keep all of the Mosaic Law that applies to us.A command does not imply ability. Do you believe we can keep all 10 commandments?
God’s law came with instructions for what to do when His children sinned, so it never required us to have perfect obedience.And shows we cannot live up to God's perfect holy righteousness.