Englishfor English speakers
qualitative
Adjective
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A reason, idea or writing is qualitative if it is about the way something is, or about the thing's qualities, but not about amounts.
I have a qualitative idea of what his work is like, but I don't know how much work he's done.
Qualitative differences between advertisements are likely to be far more important than quite large differences in the number of advertisements.
theory
Noun
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A theory is an idea that tries to explain an observation.
The new information showed that his theory about growth was incorrect.
Nobody has disproved Einstein's theory of general relativity.