Headaches are one effect that can come from inhalation of isopropyl alcohol. Isopropyl alcohol, or rubbing alcohol, is often used in the home or in medical facilities to treat various conditions or to sterilize instruments and skin. However, if isopropyl alcohol is inhaled there can be serious side effects.
1a) Definition of contradiction: A contradiction exists any time a proposition P is asserted to be true in conjunction with its negation, not-P. 1b) Definition of conjunction: A conjunction is a connective that joins two propositions.
Mathematics. ( 1 of a proof) in strict logical form with a justification for every step. ( 2 of a calculation) correct in form; made with strict justification for every step. ( 3 of a calculation, derivation, representation, or the like) of or relating to manipulation of symbols without regard to their meaning.