Real data is messy. …It’s all very noisy out there. Very hard to spot the tune. Like a piano in the next room, it’s playing your song, but unfortunately it’s out of whack, some of the strings are missing, and the pianist is tone deaf and drunk- I mean, the noise! Impossible!
![Real data is messy. …It’s all very noisy out there. Very hard Real data is messy. …It’s all very noisy out there. Very hard Image](https://www.idlehearts.com/images/real-data-is-messy-its-all-very-noisy-out-there-very-hard.jpg?x85372)