"Well, if indeed he is who he claims to be, I don't think he would be rattled by a little test…"
The Silver Knight's mind was always plotting and counter plotting. So, when an alarm bell sounded at the back of his mind, warning him that his plan could very well backfire, he took it into due consideration. It was very conceivable that there was every tendency that he could end up annoying a hidden master, consequently placing himself on the receiving end of a master's wrath.
Dale gritted his teeth. He felt like he was between a mountain and a sea, and in the very middle was a narrow bridge whose end disappeared in the thick fog of the unknown. Caution was called for. But Dale just had to know the truth.
All of these thoughts and simulations flew about with lightning speed and on a quantum level in his mind. So, after a few (rather brief and rather awkward) seconds of staring at Xzavier, he put on the deliberate fuzzy warmth of a polite host and welcomed Xzavier.