What does it mean that fields have independent physical reality?

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The explanation seems quite clear to me. Why don't you be me specific about what you don't understand?
 
dipole said:
The explanation seems quite clear to me. Why don't you be me specific about what you don't understand?

"But also have an independent physical reality because they carry energy."
What is meant by this part specifically.
 
Dash-IQ said:
"But also have an independent physical reality because they carry energy."
What is meant by this part specifically.

It means fields themselves carry energy (and momentum and angular momentum). It's quite literal.