Symbols are poor, unhandsome, though necessary, scaffolds of demonstration, and ought no more to appear in public, than the most deformed necessary business which you do in your chambers.

— Thomas Hobbes, The English Works of Thomas Hobbes of Malmesbury, Volume 7

Why do people buy an expensive, complicated toaster when a simpler, less-expensive toaster would work just as well? Why all the buttons and controls on steering wheels and rearview mirrors? Because these are the features that people believe they want. They make a difference at the time of sale, which is when such features matter most. Why do we deliberately build things that confuse the people who use them? Answer: because the people want the features. Because the so-called demand for simplicity is a myth whose time has passed, if it ever existed.

— Donald A. Norman, Living with Complexity

When we think in terms of systems, we see that a fundamental misconception is embedded in the popular term “side-effects.”. . . This phrase means roughly “effects which I hadn’t foreseen or don’t want to think about.”. . . Side-effects no more deserve the adjective “side” than does the “principal” effect. It is hard to think in terms of systems, and we eagerly warp our language to protect ourselves from the necessity of doing so.

— Donella H. Meadows, Thinking in Systems

something mentally strenuous provides a greater benefit to learning than something easy.

— Scott Young, Ultralearning

…from a Bayesian perspective, you need an amount of evidence roughly equivalent to the complexity of the hypothesis just to locate the hypothesis in theory-space.

— Eliezer Yudkowsky, Maps and Territory