# Information loss in theoretical physics

**URL:** <https://boards.straightdope.com/t/information-loss-in-theoretical-physics/956503>\
**Category:** Factual Questions\
**Created:** [December 23, 2021, 12:11am UTC](https://boards.straightdope.com/t/information-loss-in-theoretical-physics/956503 "2021-12-23T00:11:05Z")\
**Posts on this page:** 1\
**Showing post:** 8

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**Author:** ![leahcim](https://avatars.discourse-cdn.com/v4/letter/l/b4bc9f/32.png) [@leahcim](https://boards.straightdope.com/u/leahcim)\
**Post date:** [December 28, 2021, 10:45pm UTC](https://boards.straightdope.com/t/information-loss-in-theoretical-physics/956503/8 "2021-12-28T22:45:05Z")

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> [@Max\_S](#):
>
> “Two particles of equal mass touching each other” still allows for rotational motion, I think.

Depends on whether Mach’s principle is true. It is likely that if those two particles were the entire mass distribution of the universe, then they would be non-rotating by definition.

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