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.
A paradox is a self contradictory statement or situation. It's a logical process, in which the facts appear to be opposed to themselves. Paradox is a recognized philosophical tool for argument to assess groups of valid facts or logical processes which appear to be conflicting directly.