Open Interval Tests
Check if $fY = 5.29 ∈ (2.49, 9.71) = ($fX, $fZ)
(($fX < $fY) AND ($fY < $fZ)) -> ((2.49 < 5.29) AND (5.29 < 9.71)) -> 1
Check if $fX = 2.49 ∈ (5.29, 9.71) = ($fY, $fZ)
(($fY < $fX) AND ($fX < $fZ)) -> ((5.29 < 2.49) AND (2.49 < 9.71)) -> 

Absolute Value Test
Check if |$fY - 9.71| > 2.49
(($fY > $fZ + $fX) OR ($fY < $fZ - $fX)) -> ((5.29 > 9.71 + 2.49) OR (5.29 < 9.71 - 2.49)) -> 1