Hi Product Hunt, I'm Vova. For over a year I have written Business Case Weekly, a free newsletter with one company case a week.

I noticed something odd about my own reading. I'd finish a case knowing exactly where Nokia went wrong, and then a decision would land on my desk and none of it helped. Reading about a decision and making one are different skills, and only the second leaves any evidence.

decidenda is that second part. Every case stops at the fork, the point where someone had to choose, before it tells you what they chose. You write your call and why, send it, and only then does the case go on.

An AI reviewer reads your answer on five steps: Focus, Relevant evidence, Alternatives, Manage uncertainty, Execute and learn. It names the gap in your argument and gives you one method to close it. Three rules:

- It grades the reasoning, not whether you matched what the CEO did.

- It reads the case only up to the fork, never the ending.

- No score locks anything. Every answer stays editable.

Inside: 56 real-company cases, live cases on decisions companies face this month (right now: should Tesla's independent directors negotiate a merger with SpaceX?), a 10-chapter course where you are chief of staff at a fictional smart-lock company, a journal for your own decisions, and rooms where a team answers before seeing how it split.

You can open a case and get your first review without signing up.

One ask: tell me where the reviewer misread your argument. That is the part I most need to get right.