Spoilerish speculation based on raws I can't understand ...
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I believe Law is real because he appears at the very end, once Jesse wakes up in the tube and pulls the jack/connection cord out of his head (though the freaky maid may still be an android--she never seems to lose that drippy smile). I think we have a Matrix type situation--maybe it happened in a VR (probably one controlled by Law) but it was real for both of them and they were both acting and engaged in it. Jesse seems angry when he wakes, but not surprised. It looks like he is confronting Law. So, it may be a "game", it may be an experiment, it may be some army/agent advanced training, it may be a Clockwork Orange style attempt to "reprogram" a violent person, or it may be some other twist I haven't thought of. There will be an act two, so I think what happens in this VR/whatever matters.
so does this mean that nothing is real and this "reality" that Jesse is in, is all created by Moritat so everything is just in his head and laws is just A.I.