What context can I use each word in?
Learn when and how to use these words with these examples!
a priori
Example
The mathematician used a priori reasoning to prove the theorem. [a priori: adjective]
Example
It is an a priori assumption that all humans have the capacity for language. [a priori: adverb]
theoretical
Example
The physicist proposed a theoretical model to explain the phenomenon. [theoretical: adjective]
Example
In theory, the plan should work, but we won't know until we try it. [theoretical: adjective]
Good things to know
Which word is more common?
Theoretical is more commonly used than a priori in everyday language. Theoretical is versatile and covers a wide range of contexts, while a priori is less common and refers to a specific type of knowledge or reasoning.
What’s the difference in the tone of formality between a priori and theoretical?
A priori has a more formal and technical connotation than theoretical, which can be used in both formal and informal contexts.
