There is a story that goes something like this,
After a lecture on the cosmos, an old woman approached the lecturer and said, "I'm sorry but your wrong about the earth orbiting the sun and the sun being part of a galaxy, the earth is actually sitting on the back of a giant turtle"
The lecturer then asked, "Well, what's the turtle standing on"
"Another turtle." She said.
"And what's that turtle standing on"
"It's quite obvious," she said, "its turtles, all the way down."
Ever since Michael Behe first introduced the idea of irreducible complexity, evolutionists have tried to explain it away. The basic idea is that if a system made up of several parts ceases to function when any of those parts is removed this shows that all of the parts must have been present at the beginning. So how does a system that is irreducibly complex come about by gradual changes over time? It is very unlikely. This then is an indication that intelligence must be involved. It is also a falsification of Darwinian evolution, for Darwin said that if could be demonstrated that any complex system could not have arisen by small gradual changes his theory would fail. Well, molecular biology has shown this to be the case.
Behe used an example of a mousetrap to demonstrate irreducible complexity on a level we should all be able to understand, but the real evidence from specified irreducible complexity is in molecular biology. Life is overflowing with irreducibly complex, information rich, interdependent systems from the molecular level to the ecological level. So how do evolutionists deal with this? Quite often it seems that they just ignore it, its not an issue, evolution is a fact, next topic. The next thing they do is design reducibly complex systems to show you that reducibly complex systems can exist. Then they attempt to show how a system can become irreducibly complex through gradual changes. These all suffer from some logical deficiencies.
How does designing a reducibly complex system show that irreducible complexity is not a challenge to evolution?