Explain three of the five theories of forgetting. which of these three theories do you find the most compelling? why?

The decay theory- when someone has short term memory and stimulus is too weak to hold onto information
displacement theory- when you also have short term memory but this is because too much information is received at a fast pace and you can't hold onto it all. 
inference theory- when you partially remember but not fully.
retrieval failure theory-  you know the information but it can't be sought. 

I find the retrieval failure theory most compelling because you know the information 100% it just cannot be accessed. I find that weird that your brain doesn't have the ability to do so.