Answer:
Hypothesis
Explanation:
In Francis Bacon's scientific method, the guess the experiment tries to prove or disprove is "hypothesis"
Bacon brought up a method for all scientists to cross check and prove their hypotheses. So, he postulates that to know the truth of something, the hypotheses must be carried out again and again until the truth is established. To know if sickness is caused externally, healthy people should be exposed to outside influences or even to sick people in order to confirm.
Francis Bacon was known to be the father of empiricism. He believed that scientific knowledge should be based on inductive reasoning and keen observation of what nature brings.
