This is the fact: Streptococcus bacilli are present on the person's throat. If there is no other evidence except the fact which is stated above, ... Alternately, If streptococcus bacilli are present on the person's throat, but that (fact) is the only evidence, ...
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CalifJim If streptococcus bacilli are present on the person's throat, but that (fact) is the only evidence, ...That doesn't sound right to me. I think it would work better without the 'if.'