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It's nonsense to compare black holes and white holes, or one-way teleporters with two-way teleporters. They are called opposites precisely because they act in opposite ways.
Exactly. If the map creator wants players to be able to enter but not exit, they use a one-way teleporter.
But we're talking about online games on random maps, where the generator tries to simulate a two-way teleporter using two pairs of one-way teleporters, and the result is nonsense that needs to be fixed.
P.S. I didn't suggest using a washing machine as an analogy; I just corrected that analogy.
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