Could you really change past events, or is it pre-destined?

[Hououin Kyouma]

Take the Titanic. In 1898, fourteen years before the ill-fated vessel was even dreamed of, Morgan Robertson wrote the novel "Futility". It's about the largest liner ever built caring the rich and famous of the world. Then on April 9th it struck an iceberg. The Titanic, April 14th. The vessel in this book, 70,000 tons. The Titanic, 66,000 tons. Length, 800ft. The Titanic, 882ft. Both made 25 knots. Both carried about 3,000 passengers. Both liners had lifeboats for only a fraction of number of people, and both were considered unsinkable. Oh, and one more thing, the author called his ship the "Titan".

Actually the bit about the lifeboats is irrelevant, since the Titan just sank immediately after hitting the Iceberg.Just giving you more evidence to help your case.

In multiverse theory by using the phrase ''change the past'' you simply mean that you create another version of history by moving in another world line. You are not erasing the once established past to rewrite history.

Well in your Perspective you might as well be, because you could be "erasing"major events in history, or minor.

Such as in Steins;Gate where they "erased" moe culture.