When the student teaches the teacher, you know the school is fraudulent.
Nice come back, however i think the saying goes, when the student teaches the teacher, the school needs a new teacher, so therefore thats you!
Sorry if im coming across as abrasive but...I really dont know , imo its impossible to build a time machine at home so thats out. Yet this forum seems more concentrated on the scientific aspects of time travel and drawing tons of strange RogerJ like people. All time travellers are a hoax, ones who claim to do it with a device at least, otherwise this world would be extremely messed up, considering the time paradoxes that can occur.
Let me illustrate this example. To build a time machine, we first have to assume its possible.
If we assume that human civilization progresses infinitely into the future (that is to say that humans dont get wiped out), by the year 10,000 time travel would definitely have been figured out and become commonplace considering in just the last 100 years we have advanced so significantly. If a bunch of people on a forum with only home-based research and engineering skill now could make a time travel device then so could hundreds of government agencies. A hundred thousand years from now, everyone would have time travel capability, no government can hold the world for that long. The possibility of seeing and meeting a time traveler is extremely high. Once you consider those facts and the fact that our timeline has still not been completely screwed up and the only "time traveler" that appeared on the net was a hoax, it becomes highly unlikely. Out of the many travelers of which there should be thousands if not hundreds of thousands from the future, one is definitely bound to mess up and pass the schematics to people in our time, yet this has not been clearly done. We know what a small change can cause, a butterfly effect, just a small group of mischievous rebels who travel back can royally screw up anything and everything, even a singular interaction with an ancient civilization can spawn a major religion, what more 1000s of people?