To two ounces of bourbon, a half ounce of orange curacao, and a few jiggers of bitters I will add one large ice cube and stir.
I will then determine if the mixture increases or decreases my anxiety level with regard to global warming... er... climate change.
May I recommend two experiments?
Once with the ice floating in the spirits, the other with the ice stacked from the bottom of the glass to above the liquid level?
Of course, the liquid volume in the glass will likely decrease during the experiment, rendering the results meaningless ...
But I prefer my bourbon neat.
You will find that the liquid level in the glass actually decreases as the evening wears on. Yay, science!