The Explanatory Filter (EF)- Who uses it?
The EF mandates a rigorous investigation be conducted in an attempt to figure out how the object/ structure/ event in question came to be (see Science Asks Three Basic Questions, question 3).
So who would use such a process? Mainly anyone and everyone attempting to debunk a design inference. This would also apply to anyone checking/ verifying a design inference.
As I said in another opening post, Ghost Hunters use the EF.
The EF is just a standard operating procedure used when conducting an investigation in which the cause is in doubt or needs to be verified.