ABSTRACT
The distinctive feature of the revised dog/sheep case is that evidence is an interesting mix of true and false. There is the new evidence concerning Sheepish and the original evidence stemming from the disguised dog. Students have a false belief that the animal that has been in front of they all along is a sheep, plus a true belief that the animal that has just come onto the scene is a sheep. In the original dog/sheep case, the falsehood in evidence is significant because it constituted entire evidence. But in the present revised case, have another good body of evidence on which to base conclusion. Student's beliefs about evidence might be false and misleading. They might be more and more swamped by these beliefs, unable to separate the true ones from the false ones. By thinking more, trying to be more responsible in student's thinking, they call on false evidence.
