?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Derry&rft.aufirst=Jan&rft.au=Derry%2C+Jan&rft.volume=27&rft.title=Studies+in+Philosophy+and+Education&rft.atitle=Abstract+rationality+in+education%3A+from+Vygotsky+to+Brandom&rft.pages=49-62&rft.issn=0039-3746&rft.issue=1&rft.date=January+2008&rft.genre=article