Good many of them drunk as lords, said DuBois of the established merriment of the guests.

We learn the energy quotient of a bogus Earthling, note how much it varies from that of a genuine one, and then proceed to carefully single out every Neptunian. It will take time, no doubt, but not perhaps as long as we think, as the percentage of Neptunians to Earthlings is small.

Now it was real detective shitwork.

Write the instructions so that any Joe Average can understand them.