Ah! dear Grasshopper... You sure seem to have got yourself caught in a pickle...

Perhaps the best option is to just agree, learning the hard lesson that it is best to get all the facts right "before putting both feet" in it!

Alternatively, just stand you ground. You might end-up look a bit of a wanker, but at least you never admit you were wrong!

As with anything is life - nothing's black and white - all is grey...