It’s called common-sense and gut-instinct. It’s developed over your entire lifetime and based completely on your experiences. It can be either right or wrong based on things like whether a given situation is similar to the ones you’ve previously experienced and whether your reaction to those experiences was fair.
Pushing extremely large objects out of your vagina causes tearing, not psychic medical powers. If it did, most doctors would save the money on med school and just sit naked on a bowling ball for a day or two.
Thank you. That is all.
You will now be returned to your regular vaccine schedule, already in progress.