Question

Is weak interaction the only interaction capable of changing the flavor of leptons?

Answer 1

The weak interaction does change the flavour of leptons. For example a muon decays to an electron through a weak interaction

Answer 2

I see this sentence in wiki about weak interaction:

It is the only interaction capable of changing the flavor of quarks.

So why only quarks? Why not leptons? Is there another interaction which can change the flavor of leptons?
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