Definitions for "Contraries"
Propositions which directly and destructively contradict each other, but of which the falsehood of one does not establish the truth of the other.
are two propositions which cannot be both true together, but could be both false. ( Study 2)
unwanted pieces of materials which have become embedded in a sheet of paper.
Unwanted pieces of material which have become embedded in a sheet, e.g. dust, hairs, string, buttons, etc.
Unwanted materials in a waste stream.
Keywords:  pulp, wanted, matter, paper, stock
Un-wanted matter that is present in the pulp, stock or paper.