Readers should support all interpretations and conclusions with evidence from the text. Think of it like this: your interpretations are the bases of your 2nd floor in your house. The pieces of evidence are your support beams for your 2nd floor. If you do not have strong evidence,or strong support beams, your interpretations will not be supported enough and your 2nd floor will fall. Your evidence must be relevant or the evidence will not support your conclusions.
