Contents: Carnap, Hempel, Popper and Transparent Intensional Logic – Experimentation, Empirical Knowledge and Measurement – Cyclical Method of Theory Construction I: The Retreat into and Coming out from the Formal Ground – Cyclical Method of Theory Construction II: The Retreat into and Coming out from the Real Ground – What is Grounded Theory about? – Beyond the Qualitative Quantitative Divide in the Social Sciences – Historical Sociology vs. Rational Choice Theory – Reflections about Metareflections: Roy Bhaskar and Wesley C. Salmon.