That would require having Occult.  And that doesn't detect what the Charm is, only that magic is present, right?  Knowing to speak in a neutral tone would require extremely specific knowledge of Unveiling Secrets Tone, and even if it were in a printed book rather than from the wiki, Page would probably still be the only Exalt in Creation who knew it.<br/><br/>What Awareness Charm would help?  I don't know of any that do that.