The God-of-the-gaps argument is the target of frequent criticism, often over the fact that the so-called "explanation" it provides for unexplained phenomena is not really an explanation (particularly in the eyes of atheists), but rather an argument from ignorance. Such criticism is usually related to the use of the God-of-the-gaps-argument as proof of the existence of God. A common argument is that the lack of scientific knowledge about an unexplained phenomena does not mean that it is an act of God, but rather that scientific research has not yet found an answer. A commonly cited example is Thor, the Viking god of lightning. The Vikings believed that lightning was the path of Thor's hammer as he threw it across the sky at his enemies. Later on, however, scientists discovered that lightning is in fact the result of static charges building up between the Earth and clouds during a storm, resulting in movement of electrons to counteract the charge. Thor is not required to explain the existence of lightning. Other examples include disease (often thought to be punishment from a God for wrongdoing; it was later demonstrated to be linked to pathogens), the sun (often believed to be a god; later shown to be a star) and various other natural phenomena that were previously ascribed to divine intervention but were later shown to have purely natural causes. The lack of understanding about a phenomenon does not necessarily mean that a deity is responsible for its existence.
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Like I said, Techno. I don't see anything in your argument beyond god of the gaps reasoning.