You really don't know anything when you have just one of anything. The stock market went up after I flapped my arms! I might be controlling it or it might be a

You really don't know anything when you have just one of anything. The stock market went up after I flapped my arms! I might be controlling it or it might be a coincidence. Try it again a few times and you realize you're not gonna be rich. I looked at one row in my data table and discovered that it has a wacky value! It might be just the one row or I might have bigger problems. Look at more rows to find out. One witness tells the police "Jeff committed the crime!" Well Jeff might've done it, but maybe the witness just hates Jeff, or maybe they're the guilty one, trying to deflect blame. Detectives have to look for corroboration. One plane crashes into one of the WTC towers! Could be an accident. Wasn't until the 2nd one that we knew it was intentional. One person is dancing! Could be spontaneous, could be a planned routine. Add a second person doing the exact same moves at the same time, and now you know it's planned. My wife sure is great, she's the best! Well maybe she's just one of many great wives. Probably she is, but in that case you just decide to ignore the other data points and provide your own corroboration! ;)