Title text:
The plural of anecdote may not be data, but the singular of data is anecdote.
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3262/
It's more of a model over-fitting the data than p-hacking. But yeah if you introduce enough variables to your model, your explained variation in y shoots up. Problem is, none of it is causal.