Dr. bob designs and performs an experiment to test whether a new brand of raincoat is waterproof. after running the experiment and collecting the data, dr. bob concludes that the raincoat is in fact waterproof. however, when other scientists perform the same experiment, they all get different results, that show that the jacket is not waterproof. this process of double checking the results of an experiment by other members of the scientific community is called a) proofreading. b) a conclusion c) collaboration. d) peer review.