as likely as not
US /æz ˈlaɪkli æz nɑːt/
UK /æz ˈlaɪkli æz nɑːt/

1.
скорее всего, вероятнее всего
very probable; almost certain
:
•
As likely as not, he'll be late again.
Скорее всего, он снова опоздает.
•
She'll as likely as not forget about the meeting.
Она скорее всего забудет о встрече.