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• Discuss issues related to English expressions
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pedagogic vs. pedagogical

From http://www.vxu.se/hum/publ/gtn/news04_4.html :

There is sometimes a difference with such adjective pairs, as economic 'connected with trade, industry, and the management of money' and economical 'using money, time, goods etc carefully and without wasting any' (The Longman Dictionary of Contemporary English, LDCE). However, as seen in (1) to (4) pedagogic and pedagogical may occur in identical collocations ...