Scientists are encouraged to repeat experiments to verify results. Here's why:

* Reproducibility is essential for scientific validity: If an experiment can't be repeated with similar results, the findings might be due to chance, error, or flawed methodology.

* Replication builds confidence in findings: Multiple independent studies that confirm original results strengthen the scientific evidence for a hypothesis.

* Identifying errors: Repeating experiments can help uncover errors or inconsistencies in the original study's methods or data analysis.

* Exploring variations: Repeating experiments with slight modifications can help scientists understand the robustness of their findings and explore different factors influencing the results.

In fact, the lack of reproducibility is a major concern in many scientific fields, leading to calls for increased transparency and stricter standards for experimental design and reporting.

So, to summarize, repeating experiments is not only acceptable but also crucial for the advancement of science.