vs
QUICK ANSWER
"En principio" is a phrase which is often translated as "in principle", and "a priori" is a phrase which is often translated as "in advance". Learn more about the difference between "en principio" and "a priori" below.
en principio(
ehn
preen
-
see
-
pyoh
)A phrase is a group of words commonly used together (e.g., once upon a time).
a. in principle
Sin evidencia para apoyar su plan presupuestario, los legisladores solo podían estar de acuerdo con él en principio.Without evidence to support the budgetary plan, the legislators could only agree with it in principle.
a priori(
ah
pryoh
-
ree
)A phrase is a group of words commonly used together (e.g., once upon a time).
1. (previously)
a. a priori
Supusimos a priori que la cifra no podía ser negativa.We assumed a priori that the figure could not be negative.
