As usual Keolu lies... I  requote below my response to your lies.....

"The white paper criticises normal researcher interaction with the families in their study for both control and test groups. Both groups have equal attention. The only difference is in the preschool experience. These is how research is done."

The researchers also had to work with the control group. Science proceeds by comparing two groups. The test group is the one that tests the effect of preschool and the one that is the control - with no preschool. Both groups were treated the same except for preschool. Science says that the outcomes are due to the DIFFERENT treatment.

The author of the white paper is thinking like a lawyer and not a scientist to claim that comparing regular preschool with the test group has any scientific meaning. His opinion has no scientific  basis. The Cato paper is just an oped - not even reporting the facts correctly.