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Gary Comstock (professor of philosophy at Norh Carolina State University):

 " Before Rationale, I was only able to lecture at my students about the skill of evaluating arguments. 

After Rationale, I have the technology I need to help them actually acquire the skill." 


Kees van EE, Stafbureau O&O, Hanzehogeschool:

' Finally: a method that provides lecturers with real tools to help students getting their thinking and writing to a higher level.

And even more: the excellent Rationale program helps you making a good structure for your reasoning, arguments, analyses and evaluation.'


 More testimonials




Licenses for CTwR for educational institutions can include the unlimited use of Rationale on campus and at home. Site licenses for Rationale alone are available too.

Educational institutions or professional users can obtain information on a license allowing them to use the method by sending a mail.

Educational institutes in the Netherlands and Belgium can obtain a license directly via Surfdiensten if they have concluded an agreement with Surfdiensten.
Click here for a list of educational institutes affilliated to Surfdiensten ( for the Belgian institutes: scroll down when you see the list). See the Dutch site of Kritisch Denken for more information on the Dutch version of CTwR.