Express each of these statements using logical operators, predicates, and quantifiers. a) some propositions are tautologies. b) the negation of a contradiction is a tautology. c) the disjunction of two contingencies can be a tautol- ogy. d) the conjunction of two tautologies is a tautolog

Aguiding principle of the national response framework is that: a. response partners use nonstandard structures to allow for flexible and scalable responses. b. unity of effort results when responding agencies are willing to relinquish their authorities. c. effective partnership relies on engaging all elements of the whole community. d. readiness to act encourages response partners to self-dispatch to an incident scene.