Assumption vs Belief

When to use each in English, with meaning, register, and examples.

 AssumptionBelief
MeaningSomething you think is true without proof.Something you think is true.
CEFR levelB2B1
Part of speechnounnoun
Usage notesUse 'assumption' when discussing beliefs or ideas that are taken for granted. It is appropriate in both written and spoken contexts, especially in discussions related to reasoning or theories. Avoid using it in very casual conversations.Use 'belief' in discussions about opinions, faith, and confidence. It's appropriate in academic, personal, and religious contexts but may be too strong for casual discussions.

Frequently asked questions: Assumption vs Belief

What's the difference between "Assumption" and "Belief"?

"Assumption" means: Something you think is true without proof. "Belief" means: Something you think is true.

When should I use "Assumption" and "Belief"?

They can all be used in everyday English.

Are "Assumption" and "Belief" the same CEFR level?

"Assumption" is at B2, "Belief" is at B1 on the CEFR scale.

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