During demand pull inflation, cost doesn't play major role, here the main factor is demand, while in cost push inflation cost play major role, here demand is created by adjusting the coi.
<span>It is is known as perceptual constancy. In perceptual constancy you are not able to notice changes in an objects shape, size or direction. In other words, even though an objecting is changing it always looks the same to you even when change is actually occurring because you have gotten so use to your perceived appearance.</span>