Answer:
“If the laws of logic are just electro-chemical connections in the brain, then they would differ somewhat from person to person because everyone has different connections in their brain,” and thus they would be an arbitrary standard, not universal.
“Rational debate would be impossible.”
Jason Lisle, Atheism: An Irrational Worldview, October 10, 2007, Answers in Genesis, https://answersingenesis.org/world-religions/atheism/atheism-an-irrational-worldview/, accessed July 24, 2014.