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The ta haejin does in not complimentary. It's not water. He doesn't do that as a side bonus. It is his main course. Use a different analogy maybe?

Following your logic only things worthless could be given for free.

If i give you something and dont charge You it is free for you.even if somebody else pays me for it!

Haejin said free, not me. I guarantee no one pays for haejin to draw line on a chart. 'Free for you' isnt not free though. Haejin didnt say 'free for you', he said 'free'. So it was him, not me who is incorrect

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