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In American Sign Language (ASL), concepts and meanings are conveyed through the
use of space, handshape, movement, and palm orientation.
The "Reversal of Orientation for Negation" is a specific linguistic
phenomenon in ASL that utilizes a change in the palm orientation of a sign to
convey negation or the opposite of a concept.
For some (but not all) ASL signs, simply reversing the orientation of the palm
can change the meaning of a sign to its opposite
APPROVE "like" thumb-up / DISAPPROVE thumb-down
COME / GO
GOOD / BAD
KNOW / don't-KNOW
LIKE / don't-LIKE
TRUE / FALSE
WANT / don't-WANT
Related concept: reversal of movement orientation for opposition
UP / DOWN
AGREE / DISAGREE
SAME / DIFFERENT
SAME / OPPOSITE
SUPPORT / RESIST
POINT on point the point / missed the point off topic non-sequitur
Bonus sign: don't-MIND It is quite possible that the don't-MIND is a reversal of the sign MIND that migrated to the nose area and added a reversal of orientation for negation movement.
Bonus sign: INSIDE-OUT
Notes:
Also see: Reversal of Orientation for Negation
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