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. . .a scientific theory is just a mathematical model we make to describe our observations: it exists only in our minds. So it is meaningless to ask: which is real, "real" or "imaginary" time? It is simply a matter of which is the more useful description.

. . .a scientific theory is just a mathematical model we make to describe our observations: it exists only in our minds. So it is meaningless to ask: which is real, "real" or "imaginary" time? It is simply a matter of which is the more useful description.

Approximate author period: c. 1980 AD · modern

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Attribution & collection notes
Author or tradition
Stephen Hawking
Attribution: attributed
Country attributed
Not established
A country attribution does not establish the earliest origin.
Historical period
Approximate author period: c. 1980 AD · modern
Approximate author-period anchor from life dates 1942 to 2018; Wikidata Q17714, https://www.wikidata.org/wiki/Q17714 (accessed 2026-10-08). Not a quotation composition date.
An author lifetime, approximate period or collection date is not necessarily the date when these words were first written or spoken.
Recorded source
Contributor-provided quotation collection

Supplied reference C; CSV row 62755; supplied attribution, independently unverified

A collection's publication date can be later than the words it records.