as likely as not

US /æz ˈlaɪkli æz nɑːt/
UK /æz ˈlaɪkli æz nɑːt/
"as likely as not" picture
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.