"Huh," says Jessi, taking a closer look at the symbols, doing her best to memorize them for future reference.  "Well, I guess they don't work.  Or maybe they don't work if you see someone snatch it up and throw it on the ground?  Because I had no trouble at all seeing it."  She looks up at the man.  "After all, you don't seem to have any trouble seeing them.  So either you're used to being able to see hidden things, or they don't work very well."  There's just a hint of a challenge in her voice, though also a smile on her lips.