There are many problems with this kind of hypotheses: (a) any hypothesis should predict/explain facts that are different from the original data/facts that the h

There are many problems with this kind of hypotheses: (a) any hypothesis should predict/explain facts that are different from the original data/facts that the hypothesis accounts for; otherwise, it is ad hoc. (b) multiple competing hypotheses can account for the same set of facts. So, how to pick which hypothesis should one pick from the competing hypotheses? Again, here, Philosophy of sciences come to rescue. Pick a hypothesis that explains/solves more facts/problems. Here, the problems/facts should be novel, not the original ones.