.... there's a great joke about them, but...
Anyway, on the question of Relativity, that's actually a multi-layered theory.
So there are many applications that fit and sit within it.
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Imagine.... you've got a huge area and all (or most) jigsaw pieces to cover it. You can't assume you know how many pictures are within it,
Applying relativity in this scenario allows auditing for composition and/or assessing eventual placement and indicators. Meeting all of the usual methodical standards applicable.
I'll try to give an example:
I've always loved The Beatles, and my personal favourite is John... I've never met him, sadly, but I'd like to think we'd get on. Although complete strangers ... we share so much in common,
Both from Liverpool
Neither much rated school
Childhood sense of not-belonging
Appreciation of Art, Expression ... etc...
I think he'd laugh at my jokes, or at least, I'd like to think so.
Anyway, getting back to my point on relativity.... I've always been a fan.... and when I was about 14, I recall beginning to wonder what it was about some records that appealed to me more.
After identifying the cause, I thought, "Well... that figures" and tested it to see how far it stretched across the board, with interesting results.
How great would it be....?
Then I remember.... about the conditions (aka Rules) that govern - if they're good ones, they always apply.
Count my blessings and consider how worthwhile I could make life whilst enjoying my children and the sacrifices I've made for them. See how many ways I might impress them and what are the benefits associated with failure to succeed with that? (There always is one).