If you were to hypothetically time travel back 20 years to 1999 and wanted to convince people that you are a time traveler, here are a few suggestions:
Predictions of Future Events: Share accurate predictions about significant events that will occur in the near future. For example, you could predict specific sporting outcomes, technological advancements, or major news events that have yet to happen in 1999. This would require careful research and knowledge of historical events following 1999.
Knowledge of Unpublished Information: Demonstrate knowledge of unpublished information or insider details about certain events that were not public knowledge in 1999. It could be upcoming books, movies, scientific discoveries, or other significant developments that were not known at the time.
Documentation from the Future: Present physical evidence or documentation from the future that cannot be easily explained by contemporary means. This could be advanced technology, photographs, or written materials that were not available or known in 1999.
Personal Details: Share personal details about individuals or public figures that were not widely known in 1999. For example, if you have knowledge of someone's future achievements or events in their life, sharing that information could help establish your credibility.
Historical Knowledge: Demonstrate an in-depth understanding of historical events, technological advancements, or cultural shifts that would be difficult to possess without access to future knowledge.
Prove Accuracy of Scientific or Technological Concepts: Explain and prove advanced scientific or technological concepts that were not yet understood or known in 1999. This could involve explaining future scientific discoveries or demonstrating knowledge of technologies that were not available at that time.
It's important to remember that attempting to convince people of time travel would likely be met with skepticism and disbelief. Extraordinary claims require extraordinary evidence, and even with compelling evidence, convincing others would still be challenging. People's reactions and willingness to accept such claims can vary greatly.