Discernment is knowing when more information will improve the answer and when it will only delay choosing.

There is a point in every decision where further research stops improving the answer and starts postponing it. Before that point, learning more genuinely sharpens the choice. After it, you are collecting reassurance rather than information, and the delay itself begins to cost you. The two states feel identical from the inside, which is why the question has to be asked deliberately.

Try naming, in advance, the specific things you need to know and roughly when you will have them. When that list is done, decide, even if you feel you could keep going. If you find yourself adding new items to the list each time you near the end, the list is no longer about knowledge.