I'm sure a Venusian would argue that all the other planets spinning backwards, and they are the ones spinning forwards, right?
This is kind of like the "Coriolis Effect", and the argument whether all toilets flush counterclockwise in the Northern hemisphere, and clockwise in the south!
Probably quite true, but you'll never get everyone to agree. It's all dependent on your own personal view. It's always either half full or half empty.
Unless of course you are a nihlist, in which case the answer bears no relevance...
He would base the conclusion on the direction his planet is spinning, i'm just trying to highlight that 'backwards' isn't the best wording for the question, maybe 'clockwise' or 'anticlockwise' as seen from the northen pole would be better.
I'm a pedant.
Thomas, that's hardly an argument, havent you seen the way sinks drain?