Is it the definite article?
So, to reiterate, when it comes to when to use the “the”, the only universal rule is this:
Some rules (such as the two you’ve given) might hold 95%+ of the time, but unfortunately there may be weird and arbitrary exceptions that you’ll just have to learn.
Is it capitalization?
Because a cursory look at the Wikipedia page for capitalization also reveals that it is not without its quirks.
For example:
planets and other celestial bodies: “Jupiter”, “the Crab Nebula”; and “the Earth”, “the Sun”, or “the Moon” should be capitalized according to the International Astronomical Union based on its manual of style, but style guides may suggest differently.[19]
Source: https://en.wikipedia.org/wiki/Capitalization_in_English
Is it the fact the way something is written almost has no bearing on how it’s pronounced?
Please tell me your thoughts.
I think what is exceptional for English is that negation and forming a question require a modal verb. You can say “I love apples” but not “*I not love apples”, nor “*Love I apples?”. This is rare in a language. (An exception for negation could be “Apples, I love not”, but this does not sound like everyday speech.)
Fun fact: “Love I apples?” and “Apples, I love not” are how German works, and English used to be like that (back when it was still turning into English)!
(edit: actually oops it’d be more “I love apples not”, see also “she loves me / she loves me not” – V2 word order, verb goes second)
– Frost
It’s funny how learning different grammar can change the way you think. I read this and think, “Ah yes, perfectly normal Japanese word order. Topic first, with verb + negation at the end.”
I have to be careful when I talk sometimes, because my mental grammar structure is all over the place now.