Now the set A is… What shall I say? Ah! The set of all purple people-eaters in the room, and B is as before
(F. W. Lawvere & S. H. Schanuel, Conceptual Mathematics, Session 2.4)
A simple example of a preattentive task is the detection of a red circle in a group of blue circles (Fig. 1). The target object has a visual property “red” that the blue distractor objects do not (all non-target objects are considered distractors).
(Christopher G. Healey, ‘Perception in visualization’)
As Jean-Martin Charcot perceived over a century ago (1889: 382), “hystero-traumatic” symptoms may be related to an invisible yet actual brain process, “a dynamic lesion affecting the motor and sensory zones of the grey cortex of the brain.”
(Josephine Taylor, ‘Mark my words’, Southerly, 76.2)
When the money has been pegged to the blue sky and the clouds and time to the earth, I will then take all of the grey cubicle dividers from the world’s financial planning offices and the money-moving offices of every middleman and middlewoman, and I will carve them into geometric shapes and make a labyrinth in the red centre of the outback.
(Sue Stevenson, ‘The cloud of undoing’, Southerly, 76.1)