The two hardest things in Computer Science are not cache invalidation and naming things; they are naming things and taxonomizing things.

Let& #39;s take UI components as an example.
(thread https://abs.twimg.com/emoji/v2/... draggable="false" alt="👇🏼" title="Rückhand Zeigefinger nach unten (mittelheller Hautton)" aria-label="Emoji: Rückhand Zeigefinger nach unten (mittelheller Hautton)">)

Is a switch a separate control or a checkbox styled differently?
Or is it really a labeled slider with two states?

(screenshot from @openuicg )

Are tabs and accordions separate controls or different styling of the same underlying semantics?

After all, they both provide a list of buttons for showing one panel of content at a time.

(image credit: https://uxdesign.cc/little-things-in-ux-design-part-1-tabs-v-s-accordions-47390e4910c3">https://uxdesign.cc/little-th... )

What about a button group for choosing one option out of many? Is that a separate UI component or different styling for radio buttons?
Is a <select> semantically equivalent to these too?

(screenshots: @CodePen, @dabblet, OSX Finder)

Is a star rating just a discrete progress bar?
Is a progress ring just a styled progress bar?
Or maybe it& #39;s a hollow pie chart?

(screenshots: @shoelace_style )

To clarify, the questions are *examples*, meant as food for thought and to demonstrate how difficult creating taxonomies of things can be. I am NOT asking for responses!

But I would love similar examples if you have encountered them!