What if several deepest categories match?

[GitPinkRabbit]

Sorry to post here, but this is because I didn’t get any replies on the forum.

In Settings - Categorization, said:

An event can only have one category. If several categories match, the deepest one will be chosen.

But what if several deepest categories match? What’s the rule here?

Btw, how to define the depth of a category?

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