[Beasty]

Your looking at something conceptual in a metaphysical way. Identiy isn't detirmined based on physical interaction, its based upon the subsequent impact of the iteration.

To add proof to this theory, reflect upon the saying "A tree falls in the middle of the woods, and no one is around to hear it. Does it make a sound?"

Now, to digress a little, in terms of actual science, it does not; sound is the subsequent perception of waves in the air due to vibration- meaning without the perception of those sound waves, they are exactly that. Waves.

In terms of philosophy, it generally follows the same suit. While its true, the tree can fall all it wants, as many as them, as many times. As long as no one is around to hear it, to percieve and materialize a wordly reaction spawned from a prerequisite alteration of some kind, then that impact from that alteration always remains nothing. Sure, the vibrations created sound waves. But if no one ever knew those sound waves had ever existed, there existance would be impossible. You'd be defining physical altercations which stand beyond the conception of the interactive world.

Its nothing less than descring the events of a movie as if they really happened. You, along with no one else, truly perceived any of those transpiring events, however you are reinterating theoretical, not metaphysical, instances and as such, they do not constitute real instances.

To bring this full circle, the fetus may very well hear, and breathe and feel. But without a strong enough reaction to its action from the physical world, its existance only constitues a believable story.