it went straight away from us again. You saw it.” “Yes,” agreed Jubal. “ ‘Straight away from us.’ ” “But it can’t—not from both angles.” “What do you mean, ‘it can’t’? It did.” Harshaw added, “If we had used doppler-radar in place of cameras, I wonder what it would have shown?” “How should I know? I’m going to take these cameras apart.” “Don’t bother.” “But—” “Duke, the cameras are okay. What is ninety degrees from everything else?” “I’m no good at riddles.” “It’s not a riddle. I could refer you to Mr. A. Square from Flatland, but I’ll answer it.
