"More sure" or "surer"? Which is the correct comparative of "sure"?
Can I say "I couldn't be more sure / surer about that. He killed the girl."?

Question

"More sure" or "surer"?  Which is the correct comparative of "sure"?
Can I say "I couldn't be more sure / surer about that. He killed the girl."?

Answer

I would personally say, "I couldn't be more certain about that. He killed the girl." 

Personal suggestion: change sure/surer to certain

Answer

I vote just say sure.

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This ain't wrong...but I prefer"certain",too...well...if you have another way to paraphrase the"sure/surer"then why don't ya use it?

Answer

I would personally say, "I couldn't be more certain about that. He killed the girl."

Personal suggestion: change sure/surer to certain

Answer

Surer is correct.