
What if, instead believing a lie to be truth, like how you can beat a lie detector, Jinsol has to believe a truth to be a lie in order to speak it if he can't kiss a Truth or Dare to speak the truth?
So when he speaks about loving him, it is in reality a truth but to say it he must believe it to be a lie?

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No wonder why Jinsol never goes straight to the point but always beats around the bush. If he can only tell lies (when he gets F on his tounge), how can he tell the truth if he want to say sth honestly? Does that mean he has to believe the truth to be the lie? But if that the case, then when the T ones want to tell the lie, can they just easily believe the lie to be the truth ? Do they also be able to beat around the bush when they dont want to say what they really think ?

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They discuss it in chapter 14. I think perhaps Jinsol can tell the truth in writing (he leaves a note ''Find me'' in the book, while he says to Sae there is no point in trying to find who he really is as a person - so he must have lied).
And again, back to chapter 14 - it's not easy to believe lies to be truths; Sae says to do so, you must be crazy - to which Jinsol smiles.
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okay I need to post this spoiler because I need someone to share this excitement with me ahashdjkhnkjfsnvdn
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So basically Jinsol is a person who can ONLY LIE. EVERYTHING FREAKING MAKES SENSE NOW. He has an F on his tongue. I dont really get why Saegye initially saw a T. Jinwol also has the ability to switch his "F" with any other "T" or "D" through kissing apparently? That's why when he kissed Han, Han couldn't speak because in order to speak he has to lie. That also explains why jinwol always dance around when he talks never fully answering questions straight on. But now my heart hurts for Saegye bc Jinwol doesnt really love him, not that I believed he did anyways. ANYWAYS in the latest chapter, he kissed Saegye and got Saegye's Dare status while Saegye got his "F". Not sure if I also got this right but it seems like Jinwol wanted to test Saegye to see if he can still love Jinwol after finding out what he is and having a taste of how he's had to live up till now. omg my heart is hurting so much thinking about this. If anyone replies, please keep it spoiler safe so that people who don't want to be spoiled won't see.