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Of course, it was a huge myth, probably started my a chef, who just used it as an aid to select the type needed for a particular dish, but it did get a lot of people going, on the internet.
The only part about this myth that, I think might be true, is that the ones with more lobes having more seeds, this, I think would stand to reason, purely because, they are bigger and therefore likely to have more segments inside, to which the seeds are attached.