Is There a Bias Towards Selling Too Early?

If you have a thesis that hasn't been disproven, and your project gets chopped in half, don't immediately sell it. There's no reason to unless you absolutely need the money, to sell at a loss. You're going to have a bias towards selling too early. So if you have the sense to sell, marinate on this notion that there wont be a bias ah to sell too early,. And that you might want to continue holding.