Years ago when I was a wee lad, my Mom woke up in the middle of the night. She immediately called her sister hundreds of miles away who lived alone with, and took care of, my Grandma. Without any preamble, she asked her sister, 'How's Mom doing?' 'She's fine, she's rest--, How did YOU know?' My Mom never could explain how while she slept she knew, but she just knew her Mom had a heart attack.
One time when we were adults, my best friend and I shared the same dream. I mean the same dream, down to the minutest details, with each of us being in the other's dream. We were talking on the phone about a 'weird dream' we each had, and ended up finishing each other's descriptions of what transpired in that dream. Only happened once, but it was quite eerie.
Then there are the identical twins/triplets who can finish each other's sentences. One gets hurt, the other feels the pain, too.
Some things you can't explain. I'm not saying whether I believe in psychics, seers, ghost whisperers, remote viewing or whatnot, but there are people in this life whose abilities, for want of a better word, are very difficult to explain.
Quoth the Bard:
There are more things in heaven and earth, Horatio,
Than are dreamt of in your philosophy.
William Shakespeare, "Hamlet", Act 1 scene 5