there's no two ways about it

there's no two ways about it (no choice about it; there is no alternative; no other interpretation of it {folksy}) — без вариантов; двух мнений быть не может

Example 1: You have to go to the doctor whether you like it or not. There's no two ways about it. — Придется тебе идти к зубному, хочешь ты этого или нет. Без вариантов.

Example 2: His boss told him that there are no two ways about it and he will have to change his habits or he will be fired — ..без вариантов —или...или / третьего не дано—или он меняет привычки, или будет уволен.

► Note the form there's rather than there are

see also
[black-and-white issue]