biz-legal-contracts-ip-employment-and-privacylisted

# Business, Marketing, Sales and Law: Commercial Law — Contracts, IP, Employment, Privacy, and Disputes > **Part 4 of 5** of the *Business, Marketing, Sales and Law* reference (plugin `business-marketing-sales-law`), covering §14–§21. Sibling skills: `biz-models-strategy-operations-and-financing` (§0–§4), `biz-marketing-evidence-brand-and-attribution` (§5–§9), `biz-sales-process-qualification-and-negotiation` (§10–§13), `biz-reference` (§22–§26). Section numbers are shared across the set; a reference written as §N → `skill` points into that sibling skill. > > **Currency:** Strategy frameworks, contract doctrine and the marketing evidence base are stable. Two areas moved. See §22 → `biz-reference` for marketing measurement after the cookie reversal and the US state privacy patchwork. > **⚠️ Scope.** Complements an economics/accounting/tax reference (which covers economics, > financial statements, and tax structure). **This is the operating layer.** > ⚠️ **Part IV is legal orientation, not legal advice** — §15 says exactly what that > distinction means and where it binds. > > **⚠️ GOTCHA** boxes mark received wisdom that the evidence contradicts. > > **The three ideas that organize all four domains:** > 1. **⚠️ A business is a repeatable system for creating more value than it consumes.** > Everything else — strategy, marketing, sales — is a mechanism for that, and unit > economics is where you find out whether it's true (§1 → `biz-models-strategy-operations-and-financin