Ment
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1) Tongue twisters - quickly - a horse, right?
2) Vinta Rez visited Omega, and supposedly, killed Sky;
3) Lizard - MMD;
4) The Mentals were blocked, and he was a Mechaonid;
2) Why specifically Vinta killed Sky? I mean, it's possible, but where's the hint about the role? Austria? How is she connected to Vinta?
3) As I already said, that's what I think.
4) Again, what's the evidence? There are quite a few other possibilities why the Mafia didn't kill.