A very long tutorial begins well enough by telling you how to use the three different cue shot methods and spin shots. (nosleepgamer.com)
Most algorithms focus on the center of the face where humans use lots of different cues about a person, like the part of their hair. (discovermagazine.com)
Explain that you've heard different cues elsewhere and you're not sure what to do. (blog.trainheroic.com)