All scientific theories are "unproven".
That should be the end of this discussion then.
That should be the end of this discussion then.
Only for the extremely simple-minded, who fail to grasp the meaning of Dimensio's next sentence (which you have snipped out in order to distort the meaning of his response): "This does not mean that all unproven speculation rises to the level of 'theory'".
Clue for the clueless: The fact that nothing can be "proved" in this real world due to epistemological constraints does *not* mean that there are not *other* methods to validate knowledge and to distinguish valid explanations from invalid ones.
This has been understood starting from around the 1600's. Some day I hope the anti-evolutionists will manage to progress beyond a sixteenth-century worldview.