An unscientific idea is an idea that is not based on scientific evidence. It's often used to describe ideas or arguments that are not based on facts or research.
The unscientific argument is that vaccinations cause autism.
The unscientific idea is that global warming is a hoax.
adjective
not consistent with the methods or principles of science
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The Biography section is especially adoring unscientific content.
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The fad faded in the 1930s due to its unscientific basis.
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Saying that it is unscientific is a fact.
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Personifying it like that is unscientific.
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Call it unscientific, but not pseudoscientific.
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Seems to me to be a little unscientific.
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Online polls are inherently unscientific.
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Pseudoscience and junk science 'are' unscientific.
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Race is an unscientific and fuzzy idea.
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On these grounds this theory is dismissed as unscientific.