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Why are people talking about flying a flag upside-down?

Today, a bunch of people on my Mastodon feed are making declarations about somebody apparently flying a flag upside down, and this apparently has something to do with the New York Times being terrible....

https://kbin.social/m/nostupidquestion[email protected]/t/1038958

Why are people talking about flying a flag upside-down? - nostupidquestions - kbin.social

Today, a bunch of people on my Mastodon feed are making declarations about somebody apparently flying a flag upside down, and this apparently has something to do with the New York Times being terrible....

Your brain finds it easy to size up four objects but not five — here’s why

An experiment found that the brain uses one set of neural circuits to identify the numbers 1–4; these circuits are very specific to their own numbers. A separate set of circuits respond to the numbers 5–9; these are less precise, and are activated by adjacent numbers.... #neuroscience

https://www.nature.com/articles/d41586-023-03136-w

Your brain finds it easy to size up four objects but not five — here’s why

Neuron activity shows that the brain uses different systems for counting up to four, and for five or more.