Scientists assume that experimental results can be reproduced because a well-formulated hypothesis and a sound experiment all follow the scientific method, which typically includes the following steps:

• Ask a question.
• Conduct research.
• Develop a hypothesis.
• Organize and observe an experiment.
• Formulate a conclusion.

By following the steps in the scientific method, scientists control certain variables to make sure that they're testing a question correctly. The ''reproducible result'' is the test of an experiment; if the result cannot be reproduced, something wasn't initially controlled for, or went wrong.

Additionally, scientists usually repeat their experiments or tweak them during the testing process. Once they have the results, they communicate them with colleagues so that they can be tested again, or more questions can be asked to ensure sound science is being used.