Conjunction is a valid #202205062050, stated that if a statement is true, and another statement is true, then the conjunction of them (which is an and statement) is also true.
$$ \begin{align} &p\\ &q\\ \therefore \ &p \land q\\ \end{align} $$
For example, if “The book has a red cover” is true, and “The room is clean” is also true, then we can conclude that “The book has a red cover and the room is clean” which is valid.