False (logic) the sense above. In Boolean logic each variable denotes a Truth value which can be either true (1), or false (0). In a classical propositional calculus each proposition will be assigned a truth value of either true or false. Some systems of classical logic include dedicated symbols for false (0 or ⊥), others instead rely upon formulas such as and . In both Boolean logic and Classical logic systems, true and false are opposite with respect to negation; The negation of false gives true, and the negation of true gives false. The negation of false is equivalent to the truth
Midfielder mark specific opposition attackers. Defensive midfielders may also move to the full-back or centre-back positions if those players move forward to join in an attack. Sergio Busquets described his attitude: "The coach knows that I am an obedient player who likes to help out and if I have to run to the wing to cover someone's position, great." A good defensive midfielder needs good positional awareness, anticipation of opponent's play, marking, tackling, interceptions, passing and great stamina and strength (for their tackling). A holding or deep-lying midfielder stays close to their team's defence, while other midfielders may move forward to