lacking in sufficient evidence 意味

• 《be ～》証拠不十分｛しょうこ ふじゅうぶん｝である
  

例文

1. however , it has been pointed out that the argument is lacking in sufficient evidence , and some researchers argue that there are notes in " manyoshu " saying the poem was written by the empress saimei .
   しかし『万葉集』の註には斉明天皇作との旨が記されているなどの異伝も見られ、必ずしも確証があるわけではない。