A priori or A posteriori cracking?

[Mark Knowles]

Thinking that a certain page talks about what is displayed in the page?

That's the "block paradigm" solution (originally proposed by Nick Pelling) and there are a few teams working on that.

Nick's block paradigm or a simple crib combined of a few distinct identified specific words are basically good approaches. However as yet nobody has identified a proportion of text in the Voynich that maps onto a portion of text in another document and there has been very little agreement on a some kind of crib. This could change at any moment if someone were to discover a document which illuminates this relationship. Ultimately nobody knows what is lurking in the archives waiting to make this subject crystal clear.

Deciphering the Voynich without some kind of crib at all, whilst not impossible would be extremely difficult.

I should say from my experience deciphering a document when one has a lot more information than we do in the case of the Voynich can be far from easy on occasions.