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Submitted on: 25 September 1999.
Revised on: 17 January 2000.
Accepted on: 15 March 2000.
___________________European Journal for Philosophy of Science
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Submitted on: 14 August 2024.
Revised on: 31 October 2024.
Accepted on: 11 December 2024.
___________________European Journal for Philosophy of Science
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Submitted on: 30 August 1999.
Revised on: 28 October 1999.
Accepted on: 10 December 1999.
___________________European Journal for Philosophy of Science
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