Answer:
They can hide certain information that would completely change your opinion.
Explanation:
For instance if someone gets assaulted they could either put in a image that is from the crime scene or a smiling photo of the victim. This could change a potential your opinion on how harsh the punishment should be.
 
        
             
        
        
        
Look at the painting by Duchamp, entitled Nude Descending a
Staircase No.2 . The repetition and shifting diagonal lines creates a sense of  mechanistic motion of a nude, with
superimposed facets, similar to motion pictures. It shows elements of both the
fragmentation and synthesis of the Cubists, and the movement and dynamism of
the Futurists.
 
        
                    
             
        
        
        
Stevie Wonder was born in 1950
Robin Williams was born in 1951
Brad Pitt was born in 1963
        
             
        
        
        
In order to keep track of their progress when carving a block, wood sculptors may draw the outline of the sculpture on the wood, so that they will not get confused in making the sculpture.
Hope my answer has come to your help.