It's true

This confuses me because people who were born deaf and have never heard a sound can read. Do they have like an actual sound-mimicking voice in there head? What is classified as a voice versus thought? Why is my voice in my head not my own voice? There's so many things this post always makes me question.

What would happen if we suddenly lost our inner voice? This concerns me.

Or to kill your whole family in the middle of the night

Yes you would. You would just read it out loud.

Actually I didn't read it in a voice, because I was listening to "Basking in the Warmth of Christmas" from the Jimmy Neutron soundtrack.
I "read" it, but I didn't hear it in my head.

Even without the voice, I'm still literate.