We don't need to "see" it. We have evidence for it from the fossil record and genetics.
Actually we have evidence for it from the fossil record and genetics.
Only if you want to fortify the fact that you're defining "faith" in a very strange way.
No you don't. You have the interpretation of those who already believed it (or were taught it as true) and interpret the evidence to support the presupposition it is true. It was not "discovered" to be true. It was already held to be true before there was anything that could be interpreted as supporting it.
The fossil record only shows different organisms coming and going and different varieties arising and disappearing. And genetics which speaks of similarities and differences of the genomes does NOT show one came from the other or even are related in a lineal sense, but these things are way off topic and already discussed in many other threads.
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