Modus vivendi Modus vivendi Modus vivendi is a Latin phrase that means "mode of living" or “way of life”. It often is used to mean an arrangement or agreement that allows conflicting parties to coexist in peace. In science it is used to describe lifestyles. "Modus" means "mode", "way", "method", or "manner". "Vivendi" means "of living". The phrase is often used to describe informal and temporary arrangements in political affairs. For example, if two sides reach a "modus vivendi" regarding disputed territories, despite political, historical or cultural incompatibilities, an accommodation of their respective differences is established for the sake of contingency. In
Modus tollens does not detect an intruder, not whether there is one.) Another example: Another example: Every use of "modus tollens" can be converted to a use of "modus ponens" and one use of transposition to the premise which is a material implication. For example: Likewise, every use of "modus ponens" can be converted to a use of "modus tollens" and transposition. The validity of "modus tollens" can be clearly demonstrated through a truth table. In instances of "modus tollens" we assume as premises that p → q is true and q is false. There is only one line of the truth