Page 673 - Makino,Tsutusi.DictionaryOfIntermediateJGrammar

probably; likely; must be;
the writer's conjecture about some should; ought; naturally
potentiality or his certainty about a [REL. dar6; deshd]
given state of affairs
*Key Sentences

(A)

(Even the first year students of Japanese (probably) can read a
of this level.)

I I I
(If you walk around without wearing an overcoat on such a cold day, it
is a matter of course that you will catch a cold.

I I
(It is probably 1 must be easy to solve this political problem.)