That there is something within you which compells, or gives you a strong desire to study some subject more than others.
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Usually compelling studies simply means persuasive or convincing investigations. For example, Jane Doe has written a compelling study of the role of Magna Carta in English history. (It has nothing to do with compulsion).
forcing
compelling text and presentation
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A fortiori is a legal term meaning " for a stronger (reason)," that is, more logically compelling.
Compelling Evidence was created in 1992.
Appealing, entertaining, curious, unusual, engaging, captivating, compelling, gripping...
"wow that's so compelling"meaning I'm so interested in that (its so compelling).
If you mean "who studies beetles," then the answer is an entomologist (person who studies insects.)
Somebody who studies insects
The lawyer made a compelling argument for his client's innocence. The film was a compelling drama that kept me on the edge of my seat.
mean postion
what does irrigation mean