Graphics Reference
In-Depth Information
to gradually bring the card into your field of vision. (Continue fixating straight
ahead.) Try to tell whether the card is red or black. Move it so that it's 45
◦
off-
axis, and try again. Move it to about 30
◦
and try again. Continue until you are
certain of the color, and then confirm that you're correct. (Thanks to Pascal Barla
for suggesting this exercise.)
