Here he challenges the notion that practice is activity and not thought.

To start with, it might challenge the notion that violence is a product of free will.

Other pieces challenge the notion of what a print is.

They also challenge the traditional notion of what's considered a musical instrument.

The study also challenged the notion that lower Government spending leads to higher personal giving.

These findings challenge the traditional notion about the great white as being a coastal species.

He also challenged the notion that traditional schools better prepare students to be citizens.

It also challenged the notion that government was the most efficient means of looking after people left behind in the competition.

In addition, we, as a society, have to begin challenging the notion that paid work is the most important part of life.

He also takes this a step further and challenges the notion that all world cultures are equal.