The problem I'm talking about is, even if Professor changes his mask, what's the benefit in doing so? The other's doesn't know who was behind the red mask, they only saw red mask entering, so when they see a red mask getting out, they'll think the red mask has it, and go after him, na?
May be I had a valid answer for this when I wrote the answer........but now I've forgotten it😆😆😆
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