How would we know if we have never experimentally seen them?

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    $\begingroup$ They don't. They are mere figments of our imagination which just happen to come in handy. $\endgroup$ Feb 20 '21 at 7:28
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    $\begingroup$ Also, we've seen them experimentally (for example: chemistry.stackexchange.com/questions/38605/…). How so, would you ask? A contradiction? Well, quantum stuff is weird. $\endgroup$ Feb 20 '21 at 7:31
  • $\begingroup$ @Ivan Neretin I don't understand whether you are bung sarcastic or serious $\endgroup$ Feb 20 '21 at 7:43
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    $\begingroup$ Then you still underappreciate the weirdness of quantum mechanics. Who said I can't be both? $\endgroup$ Feb 20 '21 at 7:44
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    $\begingroup$ Nobody says that orbitals exist. But calculations made with them explain correctly the real chemistry like the shapes of molecules. $\endgroup$
    – Maurice
    Feb 20 '21 at 9:32