But it is possible to determine when about 50% of the obser…

But it is possible to determine when about 50% of the observers guess correctly by flipping a coin. The cat's state cannot be undefined because we already defined it as either alive or dead.
https://twetch.com/t/50871f372a520b931ca0170f01111ba083fe5213aabc49d4a585ed67783e1298