How to evaluate an idea from the CEO that he is in love with?

To objectively evaluate the CEO's idea, which they are passionate about, it is important to separate emotions from facts and conduct a systematic analysis:

1. Understand the goal and problem: clearly formulate what problem the idea solves and for whom.
2. Market research: is there demand for the solution? Analyze competitors and potential users.
3. Assess the business model: how will the idea generate revenue? What resources are needed?
4. Conduct experiments: create a minimum viable product (MVP) or prototype to test hypotheses.
5. Gather feedback: from potential clients and the team.
6. Consider risks: technical, market, financial.

It is important to have a dialogue with the CEO, ask clarifying questions, and apply a structured approach to testing the idea, so as to arrive at an objective decision together, without rejecting the initiative outright but also not falling into blind enthusiasm.