It's basically wrong to have observation taken off from hearsay. 以道听途说作为意见的根据是根本错误的。
I don't believe it; it's merely hearsay. 我不相信,那仅是谣传罢了。
hearsay
[ noun ]
gossip (usually a mixture of truth and untruth) passed around by word of mouth
<noun.communication> [ adj ]
heard through another rather than directly
<adj.all> hearsay information
Hearsay \Hear"say`\ (h[=e]r"s[=a]`), n. Report; rumor; fame; common talk; something heard from another.
Much of the obloquy that has so long rested on the memory of our great national poet originated in frivolous hearsays of his life and conversation. --Prof. Wilson.
{Hearsay evidence} (Law), that species of testimony which consists in a narration by one person of matters told him by another. It is, with a few exceptions, inadmissible as testimony. --Abbott.