No indesputable evidence exists for either side. However, intellegent design is not a theory on how we got here so much as a "theory" on why evolution is not possible. Proponents of ID make the argument that, because of the repeating patterns and complexity of patterns found in nature, random mutation and adaptation cannot account for them.
These patterns are too ordered, and hence must have been designed or planned for by some intellect cappable of understanding the pattern.
So, there really is no debate here. One theory came from a religious man trying to explain the beauty and diversity of his world. The other came from a group trying to defend their belief in where we came from and why.
Don't forget, Darwin was the first to praise god for creating such marvelous creatures that could change to so many wonderfully new things.
Your question will not be answered for another 20-50 thousand years. Until then, everything i have written is fact and the only amount of it you will get until we record evolution on tape. Even then, sadly, someone, somewhere, will say the tape is fake or transported here by satanic aliens.
Whatever it takes to set science back another thousand years.
If science is wrong we have lost all that we know to be true with our 5 senses. If religion is wrong we have lost only what was believed to be true with the sixth.