с чего ты взял

what makes you think

→ с

phrase Common #9,579

what makes you think Informal, often used to challenge or question someone's assumption.

RU: С чего ты взял, что я передумал?

EN: What makes you think I changed my mind?

What makes you think that?!

— Маленькая Вера (1988)

What makes you think that?

— Двойная страховка (1944)

What makes you think that?

— Приют (2007)

What makes you think that?..

— Скрытое (2005)