In its reaction to the crumbling belief in the tenets of the modern era, as represented by bacon, descartes, and others, postmodernism was unlike modernism because:

The appropriate answer is because: 
1. 
postmodernists did not want to supplant the crumbling convictions with another arrangement of exceedingly singular ones. 
2. 
postmodernists felt it was imperative to uncover how societies make frameworks of convictions and qualities. 
3. 
postmodernists felt that there was no real way to watch or portray target certainties outside the "lens" of culture.