« It Is not certain just what the terms weet-jabr and muqabalah mean, but the usual interpretation is similar to that implied in the translation above. The word weet-jabr presumably meant something like "restoration" or "completion" and seems to refer to the transposition of subtracted terms to the other side https://postheaven.net/crowncarbon6/het-feit-over-aluminium-kozijn-wrapfolie-dat-niemand-voorstelt