> Everything is a system... The problem is that this sometimes isn't good enough. A cell is certainly a system, but cells are far too complex to model with cu

> Everything is a system... The problem is that this sometimes isn't good enough. A cell is certainly a system, but cells are far too complex to model with current techniques. The usual next step, breaking the cell down into a group of smaller systems, doesn't work either. No such decomposition exists. In cells, everything interacts promiscuously with everything else. And it should go without saying that cells are important. If we could debug cells like we debug software we'd all be immortal right now.