Originally Posted by RogueSamurai
So using your logic, English 'sucks the big one' if someone can't speak it well?
or, All German people have blonde hair and blue eyes because one German person does..
Now, we can use probability and hypothesis testing to determine if the mean of all BJJ practinioners suck. But we would have to gather lots of them to form a population, then calculate the st dev and all that ****. From that we could decide with a set confidence level (I'd shoot for 95% confidence) weither or not they all suck.