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answer correctly, it's three points. A medium question is two points and an easy question is one point. But what you'll find out soon is that rating of easy, medium and hard is basically given to whatever the computer wants to give it to the output, making it a little bit easier for people to catch up. So anyways, here we go. What invention lets you look right through walls? That's the riddle. What invention lets you look right through walls? Over either. Oh, that's easy. It's a combination of an SDR dongle and a Wi-Fi signal. You can use an SDR signal to basically capture someone's Wi-Fi and you can look right through their walls.