Different views as to when an individual can concider a belief knowledje of fact /truth ,rather then just unsubstantiated opinion

Descartes,in Meditations 1-2″;Clifford,in The ethics of Belief;and James ,in The will to believe;have different views as to when an individual can concider a belief knowledge of fact/truth ,rather then just unsubstantiated opinion.explain when each of these of these authors believe an opinion can be concidered fact/truth;to do this you will need to discuss Descartes Method of Doubt,Cliffords notions as regards investigation ,and James ideas of leaving ,forced and momentous hypotheses .Explain whether it would be possible or impossible for each author to classify each of the following hypotheses as knowledge of fact/truth.Use relevant and short citations.Explain why each author can possibly categorize the hypothesis as knowledge or explain why it would be impossible for the author to classify the hypothesis as knoledge,but only as unsubstantiated opinion: A-Gravity exist
B-Slavery is bad
C-Extraterrestrials exist
Finally ,how would you classify the hypothesis ,(DGod exist?Either justify why you think this hypothesis can be classified as knowledge of fact/truth ,using ideas from the three philosophers above,your classification disscussion for hypotheses A-C, and your own reasoning .Or explain why you think that this hypothesis (D) cannot be classified as knowledge of fact/truth,using ideas from the three philosophers above ,your classification disscussion for hypotheses A-C,and your own reasoning.Anticioate and rebut at least one objection to your classification of hypothesis D.
Content:
-Disscussion of Descartes Method of Doubt,Clifford general ideas regarding investigation,and James classification of hypotheses.
-Applying each philosopher ideas to hypotheses A-C ,and applying appropriate (that which furthers your position) philosophers ideas to your classification of hypothesis D.
-Classification of hypothesis D,using your own reasoning and appropriate reasons provided by philosophers under discussion .
-Provide objection and rebuttal.