The Boolean operators interpret the inputs as Boolean values, where nonzero values are considered true and zero is considered false. The two input rasters are tested on a cell-by-cell basis.

Boolean Or

If one or both values are true, the output is one. If both values are false, the output is zero.

Input1 ≠ 0 and Input2 ≠ 0, Output  1
Input1 ≠ 0 and Input2  0, Output  1
Input1  0 and Input2 ≠ 0, Output  1
Input1  0 and Input2  0, Output  0

If either of the inputs is NoData, the output is NoData.