⍲
⍲Y: Y2. Pervasive.
⍲Y
⍲2x 3x ⍝ 4x 9x
X⍲Y is Boolean NAND. Pervasive.
X⍲Y
0 0 1 1⍲0 1 0 1 ⍝ 1x 1x 1x 0x