| 1. | Nature selects for fitness |
| 2. | There must be a genetic basis for getting selected and to evolve |
| 3. | Evolution is driven by use and disuse of organs |
| 4. | Those who are selected by nature reproduce more and leave more progeny |
| I: | The essence of Darwinian theory about evolution is natural selection. |
| II: | Nature selects for fitness. |
| III: | There must be a genetic basis for getting selected and to evolve. |
| IV: | Adaptive ability is inherited. |