His body language was unthreatening and his heartbeat was regular. Whoever he was, he believed what he said. It made no sense, but he believed it.

"What are the risk levels of this planet?" I didn't expect him to be able to define them the way I would have been able to if I had a complete survey package, but I didn't. Knowing what he considered to be a risk might also be useful. Humans weren't always logical in their risk assessment, though.