x < y
False
x >= y
Block[{x = 0.3, y = 0.4}, {x, y} && x < y // Trace ]
)
DeleteCases[{{0, 0, 0, 0, 0, 0, d, 1, -1}, {0, 0, 0, 1, 0, 0, d, 1, -1}}, _?(#[[1 ;; 6]] == {0, 0, 0, 0, 0, 0} &)]
And[]
True