MARK C — Counterfactual Intelligence - MARK C — See what happens before you decide.

We built MARK C around a question that kept bothering us: what if the most useful thing a decision tool could tell you wasn’t what to choose—but what would make that choice wrong? MARK C is a counterfactual decision-intelligence platform. Give it a decision and it structures the alternatives, simulates thousands of plausible futures, quantifies uncertainty, stress-tests assumptions, and uses its Reversal Engine to identify the conditions under which the preferred decision could change. We deliberately don’t want MARK C to be another AI tool that confidently hands you an answer. The goal is to make the reasoning, assumptions and uncertainty visible and challengeable. This is our public beta, and that last word matters. We know there’s plenty left to improve. We’d genuinely love the Product Hunt community to push MARK C, break it, challenge its assumptions, question the UX, and tell us what you wish it did differently. Critical feedback is just as valuable to us as an upvote. We’ll be reading the comments and using what we learn here to shape the next versions. So throw a real decision at it and tell us what happens. See what happens before you decide. Have you C MARKED it yet? ⚡