if you cannot move a facet then what is your explanation for the most popular sacro iliac joint dysfunctions corrected by manipulation.
Hmm, your phrase is unclear for me since Wikipedia reference-linkSIJ dysfunctions is not ever related to a Wikipedia reference-linkfacet joint and vice versa.

I do not believe in a joint cause in these cases since in our body, the only sensitive elements in a joint/muscles/skin/bones are neurons sending stimuli to brain and this one replying by pain (often associated by muscle spasms.) (+ the immune/endocrine systems). I made a change in my knowlege because I'm ever acting on nervous structures before acting on inert/insensitive ones. Sensitive structures (nerves/neurons) may be the key of all of our techniques since they are ever in front line of all of our actions.