There exist consistent temporal logics admitting changes of History
General Relativity and Quantum Cosmology
2007-05-23 v2 Logic
Abstract
Introducing his Chronology Protection Conjecture Stephen Hawking said that it seems that there exists a Chronology Protection Agency making the Universe safe for historians. Without taking sides about such a conjecture we show that the Chronology Protection Agency is not necessary in order to make the Universe unsafe for historians but safe for logicians.
Cite
@article{arxiv.gr-qc/0612021,
title = {There exist consistent temporal logics admitting changes of History},
author = {Gavriel Segre},
journal= {arXiv preprint arXiv:gr-qc/0612021},
year = {2007}
}