The article's a bit scattered but its central theme seems to be the Problem of Time. There's a wikipedia article on that, of course, and it's not so bad. http

The article's a bit scattered but its central theme seems to be the Problem of Time. There's a wikipedia article on that, of course, and it's not so bad. https://en.wikipedia.org/wiki/Problem_of_time https://en.wikipedia.org/wiki/Problem_of_time The structure of the the paragraph you quoted and the one following it is similar to the first two long paragraphs under the "Proposed solutions to the problem of time" section of the wikipedia article. There is a bit more here: https://en.wikipedia.org/wiki/Canonical_quantum_gravity#The_problem_of_time https://en.wikipedia.org/wiki/Canonical_quantum_gravity#The_... and a technical overview in the first section of https://arxiv.org/abs/1009.2157 https://arxiv.org/abs/1009.2157 I wrote "seems", because I found it hard to focus on an article whose second paragraph is a grotesque of General Relativity and in subsequent paragraphs brings in a not especially clearly related set of links to the author's previous articles on the recent Verlinde paper on emergent gravity and the amplituhedron, among others. :-(