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g=9.8 is an approximation, its very certainly true, and its fairly accurate
even to the 5th significant digit its still not the exact value, its only an approximation. Approximations are perfectly alright. We frequently use an approximation for pi. Its perfectly alright, and im not doubting the validity
There is no theory involved in a physical quantity that can be measured.
Is your weight a theoretical approximation. We have determined g to a larger precission than you know your factual mass because your scale is not that accurate. For anyone to imply that the scale reading is theoretical would be simply
foolish. And pi can be expressed to some 20ish digits. So much so that computational numerical analysis is the limiting factor not numerical significance in large scale
computer applications.(In lay terms computers cant carry the digits and essentially drop x decimal places to perform calculation)
The irony is that you argue the semantics of observable real world science fact and so readily push the I believe button of evolution.
I would think open minds could very easily conclude a lack of real tangible proof.
Furthermore, we live in a universe that is dictated by laws, like gravity amongst many others. This implies order, intent and even design. The fact that we do not
see the big overall picture, gives no credence to emotional antireligion based agenda's.