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It's been a while since I came back from Shanghai. I wanted to keep a low profile from the time I left until I came back, so I didn't say anything. Let's talk about the serious stuff. There are curren
There is a lamp and four switches A, B, C, and D. All four switches are required to control the lamp independently (no matter which one of ABCD changes, the lamp will change). 1. Write the logic truth