"Adriaan Heereboord (13 October 1613 in Leiden – 7 July 1661 in Leiden) was a Dutch philosopher and logician." - (Wikipedia (en) 03.05.2018)
"Adriaan Heereboord (13 October 1613 in Leiden – 7 July 1661 in Leiden) was a Dutch philosopher and logician." - (Wikipedia (en) 10.08.2021)
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