Creation cannot be proven scientifically because of the reasons stated. Even the simplest hypothesis must be observable. However, it can be proven historically because history is based on circumstantial evidence. There is more circumstantial evidence for the verity of the Genesis account being literal than for any other theory (proven throughout this thread).
However, as edifying as this is, the testimony of Scripture is all that is needed. As has been stated, the language is clear.

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For the Glory of our King,
Joe Johnson
Slave of Christ, husband, father, Preacherboy at Cornerstone Community Church, Escanaba, MI. and TMS graduate. Personal website - SoundLife.org

I do not know, and I do not say, that a person cannot believe in Revelation and in evolution, too, for a man may believe that which is infinitely wise and also that which is only asinine. ~ CHS