He didn't even *consider* telling the truth, and normally Lex does. The vision profoundly affected him, I think, and the lie to Lana confirms that he embraced it. So good. It totally made the episode.

I also think, though, that Lex's "I'll always be honest with you," even if he believed it at the time he said it, came with the implicit caveat of "As long as you're always honest with me".

What's significant about this being the ep wherein Lex lies to Lana again is that it's *also* the ep where she kind of demonstrated she's not necessarily trustworthy. I mean, she totally played him in order to steal his car, acting like she agreed with him and letting him leave the room and then taking the keys. Lex isn't a stupid man and he's got a more-than-passing familiarity with emotional manipulation. He saw Lana's conduct for what it was -- and probably also saw it as Lana's willingness to use him -- and he responded accordingly: She betrayed his trust, so he's not going to extend trust to her in return. Telling her the truth about his vision entails trusting her and she *just finished demonstrating* that that's maybe something he shouldn't do.