What are the four Ps in terms of types of evidence? Which in your opinion is the most important? Why?

What are the four Ps in terms of types of evidence? Which in your opinion is the most important? Why?

Your response must be at least 300 words in length. You are required to use at least your textbook as source material for your response. All sources used, including the textbook, must be referenced; paraphrased and quoted material must have accompanying citations.