I saw the following sentence in a book that I'm reading:
"Why do I get my best ideas in the shower?" an exasperated Einstein is said to have remarked.
I was wondering why an indefinite article is used before Einstein. My best guess is that it's because they are referring to one of many states of Einstein (for example, a tired Einstein, a confused Einstein, etc.), but I'm not sure what the grammatical reason behind this is.
I came up with other adjectives that required a definite article "the" before adjective + Einstein, for example, "the newly-wedded Einstein" or "the recently-relocated Einstein". However, I don't understand the rules for why a definite article must be used in these cases and an indefinite article in the earlier cases.