Which of the following episodes best illustrates the tentative nature of science?

Option 2 : A teacher holding a classroom discussion about the limitations of various conceptualisations of structure of atom like Thompson's plum pudding model, Rutherford's atomic model

The tentative nature of scientific knowledge refers to the idea that although reliable and durable, scientific knowledge is neither static nor definitive. Rather it is subject to change in the light of new evidence or interpretation of existing evidence. 

• The tentative nature of science says that each and everything formulated by the scientist is true only till it is truly wrong with proper evidence.
• As many atomic models were suggested by many scientists like Dalton, Thompson, and Rutherford but later these failed.
• Teachers discussing these models clearly in the classroom and the reasons why they failed can make the students realize that science is tentative.
• It also inspires students to think differently so that they can collect the evidence to prove any of the theories wrong if they get doubts about that theory.
• Thinking in the simple and same where can be avoided by introducing tentative nature to the students so that they could think creatively and in a divergent way.

Hence Option 2  best illustrates the tentative nature of science. 

• On the other hand, all the other options do not family arise the students with the tentative nature of science because established and failed theories of scientists are not indicated in that.