Idem est scire aut scire debet aut potuisse. To be able to know is the same as to know. This maxim is applied to the duty of every one to know the law
Printed copy · Anthology Volume 5, page 625Printed copy from The Tender For Law Anthology, Volume 5, page 625 (printed 13 June 2014). Added by this site; not part of the Facebook export.