So, an absolute age ago some dude called Plutarch came up with something he called Theseus's Paradox. I learnt about it in Philosophy class.

Basically, the thought experiment asks us to imagine there's a boat. And during the boat's journey across the ocean, a plank of wood in the deck gets rotten, and it has to be replaced, right? Well this keeps on happening and happening – and piece by piece – old bits of the ship are replaced with new bits. By the time it gets to port at the other side of the ocean, all of its original parts have been replaced.

So, here's the question...Is it still the same ship?

It got me thinking about Frankie; if her old parts were replaced with new parts, is she still the same person as she was before she was brought back to life? And here's where it gets really weird – because if you think about it –our cells die and regenerate all the time, so all our parts are gradually replaced too.

So, what does that mean for us? What does that mean about human identity? If all the makings of our body are different to what they were to begin with, then are we still the same person? And if we're the same, what makes us so? And if we're different, then how?

I don't know. My head's in a mess thinking about it.

What do you think?