With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: Professor X is for a time the unknowing host of the evil psionic entity Onslaught, the result of a previous battle with Magneto. In that battle, Magneto uses his powers to rip out the adamantium bonded to Wolverine's skeleton, and a furious Xavier wipes Magneto's mind, leaving him in a coma. From the psychic trauma of Xavier using his powers so violently and the mixing of Magneto's and Xavier's repressed anger, Onslaught is born. Onslaught wreaks havoc, destroying much of Manhattan, until many of Marvel's superheroes—including the Avengers, the Fantastic Four and the Hulk—destroy him. Xavier is left with his telepathy intact, but, overcome with guilt, leaves the X-Men, though without being incarcerated for his actions. He later returns to the X-Men after ', in which he is shocked by the cruel act of being turned over to the mutant-hating Bastion, following a clash with the sentient Cerebro and a team of impostor X-Men.
text_B: If Wolverine visits Xavier after these events, can Xavier speak to him without opening his mouth?
YES.