不足为凭 bù zú wéi píng
Mere report is not full to go upon.
Mere report is not enough to go upon.
Dismissals and suspensions have often taken place on the flimsiest of evidence.
And some of the educational records are even fake which can approve nothing.
Angrily I consoled myself with the dubious theory that bad luck runs in three.
Although it had such an insignificant beginning, the rumour had grown and increased in detail and importance day by day.
A merely general rule is not enough, even though by its terms it is stated so widely that it would, taken by itself, cover special cases of the kind I have referred to.
Having the big idea is not enough, to be effective it's the big ideas that win the day.
I would further add that there are reliable witnesses in Paris for most of the particulars which I bring together here, and they could vouch for their accuracy should my word not be enough.