Answers

2016-07-14T16:01:05+08:00
I believe some superstitions were rolled out only so that a lay man could simply follow them without having to understand the nitty-gritty of the reasoning behind them.
Or it might just be a statistically observed fact for which a scientific basis was discovered later.

A simple example being:
Superstition: 
"Do not disturb plants in night. They are sleeping."
OR
"A ghost sleeps on the tree at nights."

Reason: 
Plants inhale oxygen and exhale carbon dioxide in night. The low levels of oxygen might suffocate you for example in a closed room.

Or am I just retrofitting things?
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