Lucy and her older brother Louis have developed quite a fierce sibling rivalry. On a vacation in Mexico with their father, Louis and Lucy were being relatively well-behaved until one afternoon when Lucy accidentally stepped on her brother's foot and he automatically punched her. Louis apologized profusely saying that he just reacted and didn't even have time to think about what he did before he did it. Louis might try to claim that his brain was unaware of what he was doing at the time he punched Lucy because this type of response is considered a

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Louis's reaction can be considered a spinal reflex, which is an automatic response facilitated by the spinal cord without the involvement of the brain's conscious decision-making processes. This explains why he said he didn't have time to think before reacting.

Lucy and Her Older Brother Louis Have Developed Quite a Fierce