Solutions A fairly accurate guide based on practice rather than theory has 7 entries with similar clues
- 5-letter words
- hunchA belief that something is true based on a feeling rather than evidence
- 7-letter words
- empiricDerived from experiment and observation rather than theory
- 8-letter words
- a-prioriReasoning from first principles (Latin)/reasoning based on theory rather than observation
- hands-onInvolving practical participation rather than theory
- 9-letter words
- empiricalBased on observation rather than pure logic
- 13-letter words
- discretionaryBased on personal decision rather than on regulations
- 23-letter words
- niels-henrik-david-bohrDanish physicist and pioneer in quantum physics whose theory of the structure of atom incorporated quantum theory for the first time