Do you know otherwise for a fact?Do you know this for a fact?
Do you know otherwise for a fact?
If you are going to post such information, please back it up with a source.
The language of your previous post was of opinion rather than fact, that is why I asked whether it was fact.
People could act on your advice and if you are wrong, it could cost them money.
I would suggest either retracting your comment or backing it up with an authoritative source.