AUTHOR=Gregory Daniel TITLE=Commentary: The Nature of Unsymbolized Thinking JOURNAL=Frontiers in Psychology VOLUME=9 YEAR=2018 URL=https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2018.00216 DOI=10.3389/fpsyg.2018.00216 ISSN=1664-1078