The document discusses several key concepts related to theory development including:
1) Theories go beyond description to establish causal relationships between phenomena and help explain objects of study.
2) Different forms of relevance - thematic, interpretive, and motivational - must be considered in problem-oriented approaches like discourse analysis.
3) Theories require not being verifiable, solving more problems than alternatives, and passing tests, while philosophy previously required verifiability.
4) Interdisciplinarity is important for accurately solving problems, forming new knowledge, and addressing complex social issues.