> With lazy evaluation, I can pass also around the expression `head []` to different places, and it won't complain until I attempt to evaluate it - much like a

> With lazy evaluation, I can pass also around the expression `head []` to different places, and it won't complain until I attempt to evaluate it - much like a language with null won't complain until you try to dereference it. It won't complain until you try to evaluate it temporally, but the stack trace will point to the call to head.