The discussions reminded of an exercise we went through in a college psychology class, in which a story is told about a woman who was killed, and the students in the class must rank the culpability of all of the characters in the story. I googled "psychology class story about who is responsible for murder of woman on ferry".

The first google result was an academic paper about how that exercise is used and interpreted by some psychology professor somewhere.
The second google result was Mark Zuckerberg's wikipedia page. I wonder if that would have happened before the news of this suicide had come out.

Unlike in some countries, the US Constitution does not allow for National Holidays that are binding on everybody, or even binding on state governments. We have Federal Holidays, which are specifically binding only on employees of Federal agencies. Private businesses (and the State govts) are not obligated to close, or grant any sort of day off (or pay benefits) on Federal Holidays, though almost all choose to do so.

The article said otherwise:

Oops. Of course I meant to say there's more than one way to express 9.

4+3+2 and 7+2 are "equally" valid ways to represent 9.

Yes, my 3rd grader is given that kind of problem, but with a longish underscore instead of the parentheses. Sometimes it's a box, but the underscore is better, because it's a familiar holdover from learning to read, where a drawing of a feline is accompanied by "__at" and they're told to fill in the blank. I agree that using parentheses would be as poor a choice as "()at" when you want them to produce the three letter synonym for feline.

The mathematical pedagogy is fine; they're trying to develop numeracy (numeric literacy) by instilling the idea that there's more than one way to "express" 7, but they don't (yet) want to muddy the waters more by mixing letters and numbers and using phrases like "solve for"

If memory serves, (no pun intended), Michael Keaton's character in some movie or other already had the idea of feeding the tuna a diet high in mayonnaise in order to save time in the production of tuna salad.

With this form of wireless power, you don't have to remember to replace the batteries, and you don't have to interrupt the device from working while the batteries are being replaced.

Yes, just like wireless phones, which each need a special wireless receiver/transformer.