Discussion
Assertion (A): Nobody describes a colour as reddish green.
Reason (R): Red and green occupy opposite ends of a single opponent channel.
Answer: A
Correct answer: Both A and R are true, and R is the correct explanation of A
Both are true and the reason gives the cause. Red and green are the two poles of one channel, so a signal on it can be positive or negative but not both at once, and there is no way to represent reddishness and greenness simultaneously. Reddish yellow, by contrast, is orange and is described readily, because red and yellow lie on different channels.
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