The reason is always the same; there are probably a lot of values. Or maybe the other way around: for one value there will be several reasons for its appearance. In any case, it is only necessary to make one decision, depending on a certain condition, or vice versa.
Even if the solution can have several options, only one path will lead to any goal, but usually there are several paths, and you need to make a choice.
The classic conditional if statement (condition) {algorithm 1 if the condition is true} else {algorithm 2 if the condition is false} gives only two choices. But even a simple real task always gives a lot of options.
A simple “not one” but one condition
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