who is responsible listener or sayer

Responsability lies on the listener not the sayer to iterpret it true , you mesure by your understanding of the truth the thing that you hear. 

You are not responsabile for saying but for understanding it wrong

People talk, its what you hear that maters 

Garbage in Garbage out

How could you be responsible for somones words being true , you can onley be responsable for your understanding of it.

How can somones words be responsible for your actions