What does it mean that spectrum thinking preserves nuance?

Many things are better understood as positions on a continuum than as discrete categories.

Example: A doctor asks 'rate your pain from 1 to 10.' That question captures more information than 'are you in pain?' because the same binary answer — yes — covers a papercut and a kidney stone. The 1-to-10 scale preserves the gradient, and the gradient is what determines the treatment. Your classification systems work the same way: every time you collapse a spectrum into a binary, you lose the information that matters most for action.

Try this: Pick one area where you currently use a binary classification — a decision is good or bad, a project is on track or off track, a colleague is reliable or unreliable. Replace the binary with a 5-point scale. Write out what a 1, 3, and 5 look like. Notice what becomes visible at positions 2 and 4 that the binary completely obscured.