If the old Overton window (A) and new Overton window (B) are like circles in a Venn diagram and you are determined to stick in the old one, you will find that t

If the old Overton window (A) and new Overton window (B) are like circles in a Venn diagram and you are determined to stick in the old one, you will find that the intersection between it and the new Overton window is shrinking (A intersects B). This phenomenon explains why old people who do not want to change with the times will find that their Overton window is shrinking.