Presentation made by Professor Evangelos Fradelos, from the Technological Educational Institute of Thessaly (TEI of Thessaly), at the “Public Institute of Vocational Training of State Mental Hospital of Attica ‘Daphne’” Conference (http://enne.gr/category/sinedria_imerides/prosexi_imerides), 30th of March 2017. The current presentation is part of the project “Critical Thinking Across the Higher Education Curricula – CRITHINKEDU” funded by European Commission under an Erasmus+ grant.