This document outlines an agenda for a startup workshop on validating ideas. 1. It recaps lessons from previous sessions on confirming vs. validating ideas and avoiding cognitive biases. 2. Students are asked to bring 3 ideas they could have tested better, and 3 of their own ideas to workshop, each with failure modes and testable hypotheses. 3. Testing methods like surveys, prototypes, and crowdfunding are discussed. Students will design simple tests of their ideas and report results on Friday.