The hardest question in a solo founder's life is "should I quit?" Not because the answer is unknowable — but because the part of your brain that knows the answer is the same part that does not want to be the person who "gave up."

Sunk Cost Drift is the pattern where prior investment (time, money, reputation, the story you have told your parents) becomes the reason you keep going, even when every forward-looking indicator is screaming stop.

The trap is that "should I quit" is the wrong question. The right question is: "If I were starting fresh today, with the information I have right now, would I start this?" The past investment is irrelevant to that question. It is a sunk cost. It is gone whether you continue or stop.

When you genuinely cannot answer that fresh-start question, the issue is usually that you are not being honest about the forward-looking indicators. They are things like: are users paying? Is growth real? Is the problem real? Are you excited on Monday morning, or dreading it? Has the team shrunk? Are you avoiding the dashboard?

Here is the heuristic that works for most founders. If you have asked "should I quit?" three times in the last three months and not acted on it, you have already quit — you just have not admitted it. The honest thing to do is to plan the exit, not the next milestone.

The alternative — pretending the next quarter will be different — usually produces a story you will tell in a year about how you knew six months earlier and did not listen.

Lumina's Coach mode is built to interrupt this loop. Tell it what you are wrestling with. It will name the pattern, sit with you in the tension, and give you one concrete next step — without flattery, without cheerleading.