I shouldn't have to argue this, but I'll make my point. With God all things are in the present regardless of whether it is past, present, or future.No reason God could not know about these things in advance, but Ps. 82 is about things that already happened ("how long will you favor the wicked and make unjust judgments?") and was still happening ("defend the weak and fatherless..."). A command in the present tense, not future tense.