Jefferson’s use of four premises followed by a conclusion in the preamble is an example of

Deductive reasoning.

Explanation:

Deductive reasoning is a process that yields a conclusion based on a set of premises assumed to be true - meaning they are taken as facts. More specifically, deductive reasoning proceeds from general premises to a specific conclusion.

It is evidenced that Jefferson assumes truth in his premises with his initial statement in the preamble: "We hold these truths to be self-evident,".

dr. kings dream speech

explanation:

it was late in the day and hot, and after a long march and an afternoon of speeches about federal legislation, unemployment and racial and social justice, the rev. dr. martin luther king jr. finally stepped to the lectern, in front of the lincoln memorial, to address the crowd of 250,000 gathered on the national mall.