* Definition of "school": What counts as "school"? Does it include formal education, vocational training, or even self-study?
* Record keeping: Records of school attendance are not consistently kept throughout history and across cultures.
* Life expectancy: People who lived long lives in the past likely had less access to formal education than people today.
That said, we can point to some individuals who have spent a significant amount of time in education:
* University professors: Some university professors have been in academia for decades, dedicating their lives to teaching and research.
* Lifelong learners: There are individuals who continue to learn and take classes well into their later years, motivated by a passion for knowledge.
Ultimately, it's more about the value of lifelong learning than a specific record of attendance.