Final answer:
Challenging a scientific theory is part of the scientific process, and a theory must withstand such scrutiny to be considered robust. Theories like evolution have become widely supported despite initial criticism, and all theories are subject to revision or rejection based on new evidence.
Step-by-step explanation:
The statement that a theory being challenged means it's not a good theory is not accurate. In science, a scientific theory must withstand scrutiny and rigorous testing. Being challenged is a natural part of scientific progress. For instance, the theory of evolution was initially met with criticism but has since become well-supported through evidence. Theories are meant to be tested and re-evaluated as new evidence emerges.
After a theory is accepted, it undergoes continuous examination. If it accurately explains the results of subsequent experiments, it remains valid. Otherwise, it might be revised or rejected, as was the case with the notion that 'atoms are not divisible.' This illustrates that scientific understanding evolves over time.
A cornerstone of the scientific method is that a hypothesis must be testable. Experiments that consistently support a hypothesis strengthen its credibility, yet one failed experiment can lead to its revision or dismissal. Nonetheless, it's important to remember that no theory can ever be proven with absolute certainty; they are simply the best explanations we have based on current evidence.