Greg: Let me explain how I misled you so much that you thought that you were on "team A"!
Tomi: I still want the referee to recheck the results but ok, I will listen to you.
Greg: I will explain in a way that even you can understand! Huhuhuh.
Tomi: Hey! What do you mean even I can understand? You think I'm dumb or what?
Greg: So to begin with, before the first round result announcement, you asked me to use a +3, this strategy can seem pretty good at first because if a team got 4 there is a high chance that we are in the same team and in the next round reverse the cards we used and if the same team will gain 4 points again, it's almost as if not guaranteed that we are in the same team, so I said yes to your offer, even tho I already knew I will play +1 because I thought it a little deeper of this strategy, that this strategy is the most effective if you told everyone the same thing, so that you will be the only one using +1, and everyone using +3, then your team will have 4 points and the opponents team will have 0! Instead, if I use +1 then, if one team, let's say "Team A" have 2 and "Team B" have 0 then I'm guaranteed to be in team A with Tomi, but that not happened, it was 4-4 meaning that we are not in the same team with Tomi!
Tomi: So that is why yo...
Greg: Pss, Tomi. I am explaining stuff right now, please, don't interfere me. We are just reaching the interesting part! Round 2! I asked Lucas first, he approved Tomi was searched him too and with that my theory that Tomi asked the same thing from everyone is pretty much confirmed to be true, he said he searched him again and told him a meetup to give their card to the referee (after that Tomi searched me too but I did not accept that), this was to make sure who betrayed him. So I advised to do a little troll and switch our cards so if he collects he will have wrong outcomes, then I did the same with Samuel without telling him I met with Lucas before and switched cards.
So Lucas had my card (Greg), Samuel had Lucas's card, and I had Samuel's card.
Tomi: What? Isn't that against the rules?
Referee: I told you that the way we gonna know whose card is by the QR-code, there's no kind of rule that says you can't switch cards among players.
Greg: Tomi, you really think that I did not ask it before? I am not gambling at all with stuff like that! So again! Lucas had my card (Greg), Samuel had Lucas's card, and I had Samuel's card. Lucas must write +3 to my card because he will give his card to Tomi and they discussed it earlier. That means that they will see that "Greg used a +3". Samuel Must wrote +3 too, he had Lucas card: What they will see is that "Greg used a +3" and "Lucas used a +3" the rest are given "Tomi and Samuel used +1". The teams scored 4-4 points again. In conclusion, I am with Samuel, because in the first round we found out I'm not with Tomi, in the second round I found out I'm not with Lucas because both of mine and Lucas's card stated "+3" and still both teams gained 4 points.
Tomi: Tss. This is unbelievable! But what the hell did you do in the third round?
Greg: Thanks for asking! I told the story to Samuel, then switched cards. He was not sure after all I told him, he didn't know if he wanted to believe me but we were allowed to check the cards owner and he saw that I did not switch already with someone else. My card was at Samuel and Samuel's card was at me.
Tomi: So you, he just played it as if he still believes in me?
Greg: Yes! I told him to talk with you, it was not possible to say what Lucas was gonna do, but if you think about it, you wanted him to play a +3 and you lied to him, you don't want to do good stuff to someone who just lied to you and used you, right? It was most likely that he would play +1, Tomi thought the same, right? Also, the same with me, plus I used +1 the first two rounds, so why would I change right? So when you saw that "team A" gained 4 points "Team B" gained 2. It only makes sense if you are in "team A" with Samuel!
I kept you thinking that you are the one who's winning by doing the next:
Samuel always +3, me (Greg) and you always +1
Tomi: No way, you literally crushed me into pieces with ease! But why did you ask me if I gave up, huh?
Greg: Oh, I just wanted to see your reaction!
Referee: The winners are Greg and Samuel from "Team A"! Congratulations to them. Please go back to your rooms and get your stuff, we are going back to the hotel.