Comment by IanCal

> If you show the model values for y, but they are 2 in 99% of all cases, it’s likely going to yield 2 when asked about the value of y

That's not overfitting. That's either just correct or underfitting (if we say it's never returning anything but 2)!

Overfitting is where the model matches the training data too closely and has inferred a complex relationship using too many variables where there is really just noise.