________ are sets of hypotheses that have been tested repeatedly and have not been rejected.

Question

BlackTom AI · Accepted Answer

Theories are sets of hypotheses that have been tested repeatedly and have not been rejected.

1. Relevant knowledge points and concepts
- Hypothesis: a testable, falsifiable proposition or prediction. 
- Theory: a coherent set of well-supported hypotheses and principles that explains a body of observed phenomena and has survived repeated testing and scrutiny. 
- Scientific law: a descriptive generalization about how some aspect of the natural world behaves under stated circumstances (often expressed mathematically). 
- Distinction: hypotheses are tentative; theories are well-substantiated frameworks built from multiple confirmed hypotheses.

2. Step-by-step reasoning
- Start with one or more hypotheses addressing a question. 
- Design experiments or observations to test predictions derived from those hypotheses. 
- If experiments repeatedly support the hypotheses and no credible falsification is found, related hypotheses are integrated into a broader explanatory framework. 
- That framework, when it explains a wide range of observations and makes reliable predictions, is called a theory.

3. Calculations or intermediate steps
- No numerical calculations are required for this conceptual question. The “intermediate steps” are the empirical tests and repeated confirmations that upgrade hypotheses into a theory.

4. Why the correct answer is correct
- The phrase “sets of hypotheses that have been tested repeatedly and have not been rejected” precisely describes what scientists call theories: interconnected, extensively tested explanations. Theories explain phenomena (e.g., germ theory explains disease causation; theory of evolution explains biodiversity) and remain provisional but robust because of consistent empirical support.

5. Why the other options are incorrect
- Summaries: These are concise accounts or overviews, not necessarily tested explanatory frameworks. 
- Notions: Vague ideas or beliefs lacking the rigorous testing and integration of hypotheses into a comprehensive explanation. 
- Eclecticism: A methodological approach of drawing from multiple systems or ideas, not a scientific term for tested hypothesis sets.

6. Conclusion
Therefore, the correct choice is “theories,” which matches the provided answer.

________ are sets of hypotheses that have been tested repeatedly and have not been rejected.单项选择题

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