The following policy is given in WikipediaVerifiability articles should rely on reliable thirdparty published sources with a reputation for factchecking and accuracy On the other hand WikipediaNo original research states Examples of primary sources include original philosophical works and Any interpretation of primary source material requires a reliable secondary source for that interpretation it also states at the end of the paragraph Appropriate sourcing is a complicated issue and these are general rules The decision as to whether primary or secondary sources are more suitable on any given occasion is a matter of common sense and good editorial judgment and should be discussed on article talk pages The above enables me to derive some conclusions  What is mend by thirdparty sources WPV is not exactly the same as Tertiary sources NOR If the policies do refer to the same they contradict each other which probably is not the case I think thirdparty sources are placed in context other sources than Wikipedia itself and its editors this would make sense given what follows directly after the line containing thirdparty sources Reliable sources are necessary  to substantiate material within articles Vassyana said Reliance on Rand directly is a NPOV concern it is now clear that it is of no concern at all Yes an interpretation of primary source material requires a reliable secondary source but when the text of the citation speaks for itself no further interpretation is required She also said there is absolutely no need to rely heavily in any way on the primary material which is still argued in contrast I say there is absolutely no reason not to rely heavily on the primary material The arguments pro primary source material have as of yet not been given a response the focus was on the demand to have mainly thirdparty sources In the proper context primary sources are thirdparty sources fulfilling the demand Again The decision as to whether primary or secondary sources are more suitable on any given occasion is a matter of common sense and good editorial judgment and should be discussed on article talk pages Lets now focus on that