Final answer:
False. James Madison, not William Jackson, was responsible for the most meticulous notetaking and recordkeeping at the Constitutional Convention.
Step-by-step explanation:
False. The most meticulous notetaker and recordkeeper at the Constitutional Convention was James Madison, not William Jackson. Madison's collection of letters and notes about the proceedings in Philadelphia is the closest thing to minutes of the Convention. These letters and notes can be found at the Library of Congress's American Memory project.