We don’t just "believe" in Wi-Fi, we observe it working and can understand it with some physical knowledge. Energy, Frequency, and Vibration are not mystical nonsense, but they are terms often used by people who don't understand their actual meaning to say mystical nonsense.

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I got excited once when I went to an event a university and saw a "QUANTUM" licence plate outside. The crushing disappointment when it ended up belonging to Deepak Chopra type instead of a physics professor. At least he also had the sense to be disappointed that quantum entaglement doesn't allow ftl communication. So instead of sharing a scintillating conversation we got to share a sense of disappointment. So there's that.