God is true because it works under all circumstances?
That's not what I said, lol. And just so you know: I'm an atheist (or agnostic, rather) and I'm actually studying "science" (chemistry). So you don't have to be all
"hurr durr stupid christian dude who thinks his religion is much better than my master race science" :p
Allow me to illustrate what I mean by using an example from my own field. Let's say you want to model the behaviour of a fluid system. Your variables are volume, pressure, temperature and number of atoms. As you've probably learnt in chemistry, Clapeyron came up with the ideal gas law in 1834, saying that

. However, this model is absolute rubbish at high pressures, near-critical conditions or when applied on gases where the molecules interact with each other.
Van der Waals came along in 1873 and modified the model:

Still rubbish. Soave, Redlich and Kwong came up with this one in 1972:

SRK is used today, but it isn't very good either. Peng and Robinson came up with a better model in 1976. It can handle critical conditions and works well in Oil/Natural gas systems:

Peng-Robinson is widely used for modeling systems today, but the trend is that each unique system gets a unique equation of state. There are people I know who write their master thesis on a new equation of state for gas-oil multicomponent systems! And it's happening in 2013!
My point is that neither of the above equations is good enough, even though they were the best when they were first introduced. They don't work under all circumstances. In fact, the applications are rather limited. You cannot tell the "truth" by using either of these equations, and my bet is that we will continue to develop new equations of state forever. They will be a little bit more precise every time a new one is introduced, but they will never truly be able to tell the "absolute truth".
TLDR: Scientific models are rubbish. They get improved all the time, but none of them can fully capture the "truth".
OT:
Sorry for derailing the topic.
Here're some pictures of the Norwegian
Nøkken, a creature that lives in the sea and likes to lure women and children and drown them.

