claim: The Airbus A380 made its first flight on April 27, 2015.
evidence: Dichromacy -LRB- di meaning `` two '' and chroma meaning `` color '' -RRB- is the state of having two types of functioning color receptors , called cone cells , in the eyes .. color. color. Organisms with dichromacy are called dichromats .. Dichromats can match any color they see with a mixture of no more than two pure spectral lights .. color. color. spectral lights. spectrum. By comparison , trichromats require three pure spectral lights to match all colors that they can perceive , and tetrachromats require four .. spectral lights. spectrum. tetrachromats. Tetrachromacy. Dichromacy in humans is a color vision defect in which one of the three basic color mechanisms is absent or not functioning .. color. color. It is hereditary and sex-linked , predominantly affecting males .. Dichromacy occurs when one of the cone pigments is missing and color is reduced to two dimensions .. color. color