How are you supposed to discover something new about the universe if all doors are closed from the start? How do you go from zero evidence where something isn't worth being investigated further because there isnt sufficient evidence to there being sufficient evidence for it to be considered acceptable to investigate? The seems like a feedback loop that will result in nothing new ever being discovered unless something magical drops all evidence in your lap.
We have an observation. What do we do with it? First we check to see if it fits with the current model. If it doesn't fit the current model we then purpose a hypothesis and purpose a test that would prove the hypothesis there by expanding the current model.
The process isn't hey look at that, must be aliens.
