What is Amdahl's law?

Amdahl's law is a concept in personal epistemology: Improving anything other than the bottleneck is wasted effort.

Example: You run a weekly content pipeline: research on Monday, drafting on Tuesday, editing on Wednesday, publishing on Thursday, promotion on Friday. Each step takes roughly a day except editing, which routinely spills into Thursday and sometimes Friday, delaying publication and eliminating promotion entirely. You decide to optimize the pipeline. You could speed up research by subscribing to a better source aggregator. You could speed up drafting by using templates. Both are genuine improvements to real steps. Neither will change your output. Your pipeline publishes one piece per week — sometimes zero — and that rate is determined entirely by the editing bottleneck. If you cut research time in half, you finish Monday's work by noon. Then you wait. The draft still arrives Tuesday. Editing still overflows Wednesday. Publication still slips. You optimized a non-constraint and the system did not notice. Now instead, you focus on editing. You create a style guide that eliminates recurring decision points. You batch similar edits. You establish a 'good enough' threshold that prevents perfectionist loops. Editing now fits within Wednesday. Publication happens Thursday. Promotion happens Friday. Output doubles — not because every step got faster, but because the one step that determined system throughput got faster. Every hour you spent optimizing research was wasted. Every hour you spent optimizing editing was leveraged.

This concept is part of Phase 29 (Agent Optimization) in the How to Think curriculum, which builds the epistemic infrastructure for agent optimization.