Write the negation of the following statement:
$r:$ All birds have wings.

The statement $A$ $\rightarrow (B$ $\rightarrow A)$ is equivalent to

The dual of $(x \vee y) \wedge (x \vee 1) = x \vee (x \wedge y) \vee y$ is

The negation of $(p$ $\Rightarrow q)$ $\Rightarrow (q$ $\Rightarrow p)$ is

Which of the following is not a statement?

Rewrite the following statement in the form "$p$ if and only if $q$":
$p:$ If you watch television,then your mind is free and if your mind is free,then you watch television.