Submitted on: 14 November 2000.
Revised on: 02 March 2001.
Accepted on: 31 March 2001.
___________________European Journal for Philosophy of Science
http://reply.papertrans.cn/1/91/9079/9079-32.png
Submitted on: 11 October 2001.
Revised on: 15 December 2001.
Accepted on: 06 January 2002.
___________________European Journal for Philosophy of Science
http://reply.papertrans.cn/1/91/9079/9079-34.png
Submitted on: 10 November 2020.
Revised on: 27 January 2021.
Accepted on: 22 March 2021.
___________________European Journal for Philosophy of Science
http://reply.papertrans.cn/1/91/9079/9079-36.png