What is one effect of Douglass's use of contradictions in the introduction of his speech?

In the introduction of his speech, Frederick Douglass employs contradictions to highlight the hypocrisy of a nation that celebrates freedom while perpetuating slavery. This rhetorical strategy emphasizes the moral inconsistency between American ideals and the reality of oppression, thereby compelling the audience to confront the injustices of their society. By juxtaposing these opposing ideas, Douglass not only captures attention but also evokes a sense of urgency for change. Ultimately, this use of contradictions serves to strengthen his argument for equality and justice.