It proceeds to describe the devices used and manner in which catharsis is brought about .
The Tractatus states that comedy invokes laughter and pleasure , thus purging those emotions ( catharsis ) , in a manner parallel to the description of tragedy in the Poetics .
Tractatus proceeds to describe the devices used and manner in which catharsis is brought about .
The Tractatus states that comedy invokes laughter and pleasure , thus purging those emotions ( catharsis ) , in a manner parallel to the description of tragedy in the Poetics .