Final answer:
The alien theory isn't considered a scientific claim because it lacks valid data, substantial evidence, and reliable sources necessary for scientific acceptance. For a theory to be scientifically valid, it needs to provide empirical evidence that can be repeatedly observed and tested.
Step-by-step explanation:
The alien theory is not considered a scientific claim because it lacks valid data, substantial evidence, and reliable sources. In science, a theory must be based on factual evidence that can be observed, tested, and verified. This is known as empirical evidence. The scientific method requires a hypothesis to be testable and repeatable. As of now, the alien theory does not meet these requirements hence it's not generally accepted in the scientific community.
For example, if someone claims to have observed alien life, but can not provide credible evidence to support this claim, then it cannot be accepted as a scientific theory. Without substantial evidence, and reliable sources, the claim remains unproven and speculative, which doesn't align with the principles of scientific inquiry.
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