Time travel loop

Quote:

---

Originally Posted by Xei

No, you can travel into the future via going very fast or by being in close proximity to a very strong gravitational field. It's not disputed; and it's been observed experimentally in many forms.

---

References?

Quote:

---

Originally Posted by Xei

You can travel into the future arbitrarily fast by the way.

---

Explain how. Is not "the future" arbitrary already?