@PhilosophyExp pls excuse my idiocy - y don't I need to check whether the yellow card has a circle? could be square. says we only know shape
@posty Because rule only says that if there's a circle, there must be yellow. It doesn't say if there's yellow, there must be a circle.
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@PhilosophyExp I'd check all cards for errors:what if square card had a yellow side?Thanks. Twitter will use this to make your timeline better. UndoUndo
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