If you read this thread, you will see that the skeptics have considered all sides of the issue. It is the skeptics who did the exploration. It was the previous failed pseudoscientific UFOlogist who couldn't see any side except OMG PseudoAliens! It's the skeptics who say, "Yes, I could easily be convinced." It's the credulous who say, "No matter what you say, no matter there is no evidenece, I know they're aliens!"
Are you going to start doing anything differently? Are you going to consider that fallacious thinking has brought you to the point where you believe some UFOs are alien invaders? Or will you close-mindedly continue to subscribe to your pseudoscientific null hypothesis which is "Some UFOs are of alien origin"? That means that you start with your conclusion, pseudoscientifically.
Ask a skeptic what it would take to convince them that some UFOs are alien spaceships. Can you guess what the answer is? If you said "Just one confirmed case of an alien spaceship", you'd be right.
Now ask a pseudoscientific UFOlogist what it would take to convince him that he has engaged in fallacious reasoning. What would the answer be?