01 · Lead with the entity and the claim
Sentence 1: '<Entity> is <definition / answer>.' No setup. No throat-clearing. Example: 'CAC is total acquisition cost divided by new buyers in the same period.'
- What ships at the end of this step — a tangible artefact / change you can point at.
- Common pitfall here: rushing past validation before moving to the next step.
- Time estimate: 1-2 weeks for foundation work.