Once upon a time PhD supervisors were recommended a phdcomics website.
Literally, ‘phd’ here stands for ‘Piled Higher and Deeper’ – the paper swamp with so many of us still trapped in.
This cartoon 
is thought provoking: what is our ‘unanswerable’ question is machine learning / computer vision? Here’s my try:
- “Hey dad, can your program tell the twins apart?”
- “Can your algorithm be parameters free?”
Any more?
