Where can I find early occurrences of 'pseudoproblem', 'pseudosentence', and 'pseudoconcept'?

The term 'pseudoproblem' was made popular by the Vienna Circle in the 1920s and 1930s. But this and similar terms ('pseudosentence', 'pseudostatement', 'pseudoconcept') were used before. I found...

19 February 2016 10,013 4 View