"At Will" hiring laws absolve employers from having to explain why you've been sacked. They don't even have to acknowledge that you asked.
On the plus side, there is no law that says you must give two weeks' notice of your resignation.
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The mere fact that science may not yet adequately explain an object, event, or experience does not mean the immediate explanation should automatically default to a conspiratorial, extraterrestrial, paranormal, or supernatural cause.