Rawle was a founding member of the “Society of Polical Inquiries”, a society formed to discuss the science of government. The Society was formed in February, 1787. Ben Franklin was the President and Thomas Paine wrote the by-laws. Rawle was a member of the committe of papers. The society met twice a month at Franklin’s house. Other members included Governour and Robert Morris, James Wilson, Benjamin Rush. Rawle presented a essay on immigration at the April 20th, 1787 meeting.
So it is likely he had some knowledge about the Framers intentions.