"I feel bad sometimes that I ever did it," John Sylvan told The Atlantic in an interview. Because the K-Cups are bad for the environment -- they are disposable and not recyclable. Sylvan originally envisioned the cup-like pouches that brewed a single serving of coffee for offices, where people want different brews. But the technology caught on, and Keurig Green Mountain (GMCR) brewers are now on kitchen counters everywhere. That means more and more K-Cups are being used -- and thrown in the trash. Sylvan isn't in a position to do much about the problem. He sold the company for $50,000 in 1997, and it's now owned by Green Mountain, the brewing company. "I told them how to improve it, but they don't want to listen," Sylvan said. Sylvan and others have designed solutions, like reuseable K-Cups. He said he even tested his design "years ago, and it worked." But Keurig has tried to block those cups from working in its machines. The company says it has a plan of its own and is "committed to making 100% of K-Cup packs recyclable by 2020."

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How did he know? Masters of Logic Puzzles (dots) Three Masters of Logic wanted to find out who was the wisest amongst them. So they turned to their Grand Master, asking to resolve their dispute. "Easy," the old sage said. "I will blindfold you and paint either red, or blue dot on each man's forehead. When I take your blindfolds off, if you see at least one red dot, raise your hand. The one, who guesses the color of the dot on his forehead first, wins." And so it was said, and so it was done. The Grand Master blindfolded the three contestants and painted red dots on every one. When he took their blindfolds off, all three men raised their hands as the rules required, and sat in silence pondering. Finally, one of them said: "I have a red dot on my forehead." How did he guess? Masters of Logic Puzzles (hats) After losing the "Spot on the Forehead" contest, the two defeated Puzzle Masters complained that the winner had made a slight pause before raising his hand, thus derailing their deductive reasoning train of thought.

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