How are the phrases War is Peace, Freedom is Slavery, and Ignorance is Strength contradictions? What is their

purpose so far in the novel?

Book:1984

These phrases are contradictions because they speak of contradictory things being compared as if they were synonymous, as if one were necessary for the other to occur, but in fact there is no such a thing.

They believed that they could endlessly engage in a war to keep peace in the country