scintilla

1. QUANT If you say that there is not a scintilla of evidence, hope, or doubt about something, you are emphasizing that there is none at all. 一點[文學性] [with brd-neg, QUANT 'of' n-uncount]

He says there is "not a scintilla of evidence" to link him to any controversy. 他說“沒有絲毫証據”能將他與任何爭議聯系起來。