I don't see 'out rule' in the link you provided, but I too suspect that it should read "rule out".
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Sandy HoMy question is why is "out rule" here, isn't it supposed to be "rule out",or something else I don't know? if it turns out to be "rule out" ,then why people write sentence like that?Given the answer at the link you post my guess is that the question is very badly formed. I think the questioner meant to ask how to "cover up" or "deemphasiz