Schur bases his definitions of equality, of addition and multiplication of projective segments, upon the correspondence known as ' prospectivity,' and, at first, avails himself only of the axioms of connection and of order [Shur's postulates 1. to 8.];
He did not apologize for it, nor make it a handmaid to something else, nor attempt to prove its practical value by an appeal to commercial motives, nor, in short give any of the thousand bad reasons by which stupid people habitually misrecommend good things.
The Ordos region in the narrower sense is nomadic by history, in contrast to the agricultural and densely populated southeastern loess part that stretches up to the Wei River valley.
In case of necessity it is permissible to change one's madhhab or to do a few things according to another madhhab. It is haram to cheat in order to omit a fard or commit a haram.