From what i have read up on in the past, They can but they don't really think with a "voice" in their head if that makes sense.
It would drop you pH levels in your body prior to eating. When you eat the burger it will bring it back up, hopefully to 7 (neutral)
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The individuals gametes cells would be damaged, possibly taking his ability to have offspring.
For one it is False
two is exhibition
I need terms to answer three