This is a logical operator that allows us to select two kinds of elements. Its use is equivalent to telling PitStop: "...and also whichever is...".
Warning: The difference between "AND" and "OR" as logical operators is that "AND" restricts the selection, while "OR" broadens it: "AND" implies a subset within a set (the selected elements must have both qualities at the same time). "OR" implies two distinct sets (the selected elements are only required to have one of the qualities).
To exclude qualities we must use the "NOT" operator.
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