Here is the problem: It doesn't matter if someone claims that gravity doesn't exist. We experience gravity anyways. Those who do not believe in gravity will still experience the effects of it. Now, taking that example and using it for the moral problem is easy. Objective morals exists regardless of opinion or beliefs. Why? Because we experience them.
To continue playing the Devil's Advocate.
This argument has a problem, if I drop a 10 pound ball and if someone else then drops that same ball then they will both fall at the same rate. However, these two individuals can differ with regards to their moral experience as one may live a homosexual lifestyle and believe it to be perfectly moral while the other has a strong sense that it is immoral. If these moral experiences were universal in nature then this argument would be valid, but simply basing the existence of objective morality off of a person's subjective experience is simply a faulty line of reasoning.
Here is where the fallacy and logical inconsistency resides: First of all, saying something does not exist is not proof that it does not in fact exist.
The same fallacy extends to the positive argument as well, saying something does exist is not proof that it does in fact exist.
Second, objective morals are consistent with everything we experience.
Who is we? Westerners? Are you factoring in cultures that greatly differ in their moral understanding of the world? If we look throughout history there have been cultures with vastly differing moral views, indeed it is hard to say that there is one moral virtue that has been universally held throughout all time.
They are here, and cannot be explained away without logical absurdity.
Please explain.
So, objective morals do exist. Where do they come from? The morals need an anchor point. You could say the flying spaghetti monster is the source of all morals, but the argument isn't rational. That is, we have no good reason to believe the spaghetti monster is the actual source. Instead, a simplification is needed.
How is the argument not rational? You keep making these claims without justification.
An anchor is needed for Objective morals (to make them universal and binding)
Christians have an anchor, and Atheists do not. Even the most grounded Atheists will admit that Objective morals do exist (and that they have no explanation for them).
Many atheists do not hold that there are objective morals actually, there are ethical egoists, ethical emotivists, ethical relativists, ethical hedonists, ethical nihilists, etc.
Also, can you find me one prominent atheist who 1) claims that objective morals to exist and 2) says that there is no explanation for them? I often here this charge, but more often see no evidence for it. As a former atheist, I know that I never claimed such a thing nor have I ever heard it except from theists.
Sorry, but the whole "chemicals in the brain" argument is not an anchor. It doesn't show us why hugging a child, and mutilating them with a screwdriver are different (morally).
It's not just "chemicals in the brain," it is how those chemicals in the brain tie into our conscious experience where we can objectively determine that one behavior exhibits a healthy and beneficial act that produces happiness, while the other excruciating pain. These are not arbitrary observations, but deeply effect the conscious experience of these agents.
This is also what I call a "naked assertion," you've not presented an argument, you've mentioned a possible argument and then without any justification dismiss it.
God is a perfectly rational explanation for our experience of Objective morals. In fact, it is the most rational explanation we have.
Again, another naked assertion. This is not an argument, it is an assertion given without any justification with regards to it's validity.
How is it rational? What makes it the most rational? Don't you see how easy it is to poke holes in these kinds of "arguments," only those who already agree with you will find anything you have said compelling.
No Atheist has been able to offer a rational explanation to the contrary, despite numerous opportunities to do so(on the Academic platform).
Another unjustified assertion. Have you accurately presented the explanations proposed from the secular sector of Academia? Have you then offered sound and logical refutations to these ethical systems?
Sam Harris had the perfect opportunity when he debated Dr. Craig. In fact, Craig challenged him to offer a counter argument multiple times. Of course, the challenge went unmet.
Please see the above.