What Is the Strongest Piece of Evidence We Have for Non-Human Intelligence (NHI) or Extraterrestrial Life?

Based on everything we have so far including the recent U.S. government UAP releases, military videos, historical cases (such as Roswell, Kecksburg, the Las Vegas Alien), government documents, whistleblower testimony, radar data, pilot reports, and scientific evidence... I'm looking for the single strongest piece of evidence, the strongest case, so to speak. Not just your favorite case. Or actually, yes it could be your favorite case if it fits the bill. No worries there. I'm interested in ev...