Some months ago on this site I came across a Latin term that described the idea of putting forth an argument for one side of an issue, but while doing so attempting to maintain grasp or control over a point in your favor from the side you are arguing against.
The essence was that your argument for or against a broader point indirectly discredits a very specific thing you are trying to achieve. An example might be arguing that college admission policies should be colorblind and not discriminate on the basis of race, while desiring to maintain quotas for each race as a way to achieve some balance and force diversity. If you win on the first point you may lose the second. (especially if implementation requires removing identifying information from the application form)
The term seemed like an apt descriptor for some of the logical fallacies and hypocrisy I observe in discussion around social issues and I would like to research this further, but can't come up with a key word to search by...
What is the term for this practice or concept?