Can I ask why under "Films with no good reason" there are several movies that have pointed out "Have good reason"?

Removed:

• Similarly, one of the constellations seen in the game Pokemon Snap is also shaped like a Mewtwo. How the heck did Arceus come up with the idea of a Mewtwo constellation if it was created billions of years ago back when there was still only one Mew?

If it was created by a divine being, then that being could well have known the future; if it came to existence normally just like in our world, then constellations are temporary (as stars aren't stationary), and its resemblance to MewTwo is coincidental. (And, presumedly, billions years ago the first Mew didn't exists, either.)

I cut this because I agree with the response that this was "Technology Marches On", since Heinlein could not have anticipated how computer development, etc., would play out.

• Robert A Heinlein's early works often featured the use of slide rules and "astrogation charts" in piloting starships!
  • Do note that Heinlein started writing in 1939, before computers really took off. This seems to be more a case of Technology Marches On.

• The TMNT movie has the Ancient Aztec generals have names in Spanish. A language that did not even exist back in 2000 BC, and was not introduced to Mexico till after 1492 AD. You Fail Linguistics Forever, You Fail History Forever, and Spexico also apply here.
  • Aztecs in 2000 BC?

Was the "Ancient Aztecs" an error of the troper that added this, or of the TMNT show? Because I'm not sure how to fix this.

Should the Nausicaa Of The Valley Of The Wind example be removed? Hayao Miyazaki did establish that it took place After The End.

Does this include in-universe anachronism, or is there a different trope for that? For example, if an adaptation of Tolkien's Silmarillion included the One Ring.