karimi_sakineh12@yahoo.com amir_karbasi@yahoo.com Knowledge, No.71/1 176 Sakineh Karimi,AmirEhsan Karbasizadeh Criteria of Being Natural Kind and Their Realation . . . K P 1 . Ellis172 2005 2 Bird 2009:497-498 177Knowledge ، P K 1 Putnam1975: 146-148 2 full essence 178 Sakineh Karimi,AmirEhsan Karbasizadeh Criteria of Being Natural Kind and Their Realation . . . 1 Mill 1884: 122–123 .(Bird 2009: 503) 3 Bird 2009: 500 4 Hawley&Bird 2011: 205-207 179Knowledge ، 2 . Mumford2004, 110. 3 Bird&Tobin2009,URL 180 Sakineh Karimi,AmirEhsan Karbasizadeh Criteria of Being Natural Kind and Their Realation . . . c b a c a b a a 1 . Ibid. 2 . Quine 1969: 114-119 3 . Quine 1969: 114-119 4. Boyd 1999: 67-98 181Knowledge ، 2 Bird&Tobin 2009: URL 182 Sakineh Karimi,AmirEhsan Karbasizadeh Criteria of Being Natural Kind and Their Realation . . . 1. Ellis 2002:39 183Knowledge ، 1 . Bird: 2009 499 2. Mumford: 2004, 17-22 3 . Bird&Tobin 2009: URL Bird 5 Bird&Tobin 2009: URL 184 Sakineh Karimi,AmirEhsan Karbasizadeh Criteria of Being Natural Kind and Their Realation . . . a a a a a 1 . Ellis 2002: 45 2 . Kuhn 2000 see Bird&Tobin 2009,URL. Ellis, 2002 : 26-27 185Knowledge ، 186 Sakineh Karimi,AmirEhsan Karbasizadeh Criteria of Being Natural Kind and Their Realation . . . 1 . Hierarchy 187Knowledge ، 1 . Ellis2002, 25 & 85. 188 Sakineh Karimi,AmirEhsan Karbasizadeh Criteria of Being Natural Kind and Their Realation . . . 189Knowledge ، a a a F F a 2 . Forbes1985,3. 3. Fine1994,1-2. 4 . Kripke1971, 145-146. 190 Sakineh Karimi,AmirEhsan Karbasizadeh Criteria of Being Natural Kind and Their Realation . . . a K K a 1 . Bird&Tobin2009,URL. 2 . Fine1994,2-4. 3 . Bird2009, 498. 191Knowledge ، a a a F a F F essentially possesses Fa Fa N a possesses F F a N Fa N F a F a Fa Fa 4=2+2 2 192 Sakineh Karimi,AmirEhsan Karbasizadeh Criteria of Being Natural Kind and Their Realation . . . F a N 1 . Fine1994,6. 2 . Ibid. 3 4 . Brody 1967: 435-440 193Knowledge ، a a F a F F a a a F a possesses F essentially a loses F a ceases to exist 1 . trivially. 2 Bird2009,498 . 3 . Ibid. 4 Ibid. 5 Aristotle1995: 1006a & 1006b F a F a ( Bird 2009:498) a 194 Sakineh Karimi,AmirEhsan Karbasizadeh Criteria of Being Natural Kind and Their Realation . . . a a F F F F a a a N F 1 . McGinn1976: 129-132 195Knowledge ، B A B A A B A B A 1 hacceitas 3 Forbes 1985: 99 & 120-140. Bird 2009: 500-501 4 Kripke 1980: 114 196 Sakineh Karimi,AmirEhsan Karbasizadeh Criteria of Being Natural Kind and Their Realation . . . 1. Bird 2009: 500-502 2 Bird 2009: 502 197Knowledge ، K a K a K K a 1 Kripke 1980: 114-115 2. Bird2009: 503-504 3 Bird2009: 504 4 Ibid. 198 Sakineh Karimi,AmirEhsan Karbasizadeh Criteria of Being Natural Kind and Their Realation . . . a : a a a 1 LaPorte 2004: 94-100 199Knowledge ، b a a b H O H O XYZ XYZ XYZ XYZ H O 1 Kripke 1980: 65 2. Bird 2009: 505 3 . 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