That is unfortunate. I think my teachers would have accepted something along the lines of "Here are some reasons I thought of; I don't think any of these reasons are very good, though, so I actually don't know what happened."
Maybe a teacher could introduce an experiment where the students have been taught a "lies-to-children" model that doesn't quite work in the experiment, then have them do the experiment, and then after some agony on the students' part, explain that the results were because the model is actually wrong and now they need to learn a newer one. As a sort of live-action science retelling. Still a little bit cargo-culty because there is still an answer at the end of the tunnel, but might give them a better idea of how things are supposed to work.
As a teacher, I wonder if it is possible to instill this skill into students the skills of rationality and critical thinking. I teach the third grade, and it is not immediately apparent how to apply this with my own class.
The problems I foresee are as follows:
In the sequences, it is suggested teachers should drill into students words don't count, only anticipation-controllers. How practical is this for an elementary school level? Also appreciated would be any ideas or experiences on how to do this, or how to combat the above problems. Hearing from other teachers would be excellent especially.