Most situations are "contrived" in some sense.

Now split-second emergencies aren't always purposely contrived, but notes aren't much use then, either.

If class more closely mimicked "real world scenarios":
Exams would be open note, open classmate, open textbook, open internet, etc.
A student that (without permission/notice) skipped five class sessions or came to class drunk would be expelled, possibly with no transcript.
A student could do everything right and still fail an exam because of the performance of a classmate.
Examples done in class would never directly apply to exams.
Lectures would consist of an office politician trying to "sell" a project that would increase his budget, and use inaccurate-but-impractical-to-falsify information to do it.
50% - 90% of class time would be spent on stuff that had little to do with the class title, description or syllabus.
Exams would often be on an entirely different subject with no warning to prepare.
Grades would depend on vague criteria that can always be used to justify any grade the professor chose to give you.

Not me. I want one that looks like it was built from Lego bricks.

(bold added)
Don't you ever do anything for convenience?

You're right.

I was responding to what I percieved as an attempt to imply that the correlation means something.

If there was no attempt to imply such, I apoligize.

You've fallen victim to THE classic statistical fallacy.
Now, repeat after me, "Correlation is not causation."

So, when people at work call you Frankenstein, do you remind them that Frankenstein was the doctor, not the guy made out of dead bodies?

Then it's not much of a murder weapon. Might as well just buy them an extra beer after work for a couple of years and hope they die in a car accident.