Reliable knowledge – Reliable knowledge can be interpreted in a few slightly different ways.  It can mean something along the lines of consistent or trustworthy depending on the context. Reliable knowledge can have wholly different meanings depending on the AOK and RLE.  Think carefully about what it takes for knowledge to be viewed as reliable.  

Lack certainty – Knowledge that can lack certainty won’t be able provide confidence and may create doubt. 

Like the other Prescribed Titles that have two central key terms, you need to look for RLEs where reliable knowledge can lack certainty and other RLEs where reliable knowledge must have certainty.

Two areas of knowledge – No clarification necessary.  Stick to two.