Ky thuat thuyet phuc bat dau bang mot yeu cau qua lon de bi tu choi, sau do dua ra yeu cau nho hon de de duoc chap nhan.
Example
Xin nguoi khac lam mot viec rat lon, sau khi bi tu choi moi dua ra loi de nghi thuc te hon
Tam ly hoc xa hoi
Ky thuat "sap cua vao mat"
Door-in-the-face