Insight: Things that are over-engineered are difficult to use.
Reference: Donald Norman, design critic - the concept of 'natural mapping' - how things are used. Objects should have clear affordances - elements that make it easy to understand how to use them (handles, switches, grips etc.)
Reference: Rudolf Flesch (1911-1986), readability expert and writing consultant: advised that the 'golden mean' of sentences is 17 words. Keep sentences short. Use short words.
Insight: Scientists regularly use Occam's razor with theories.
Reference: William of Occam: "it is vain to do with more what can be done with less".