In this context, "hold" likely does not mean "accepting". I read it to mean closer to "consider", which means that one is able to consider two opposing argument

In this context, "hold" likely does not mean "accepting". I read it to mean closer to "consider", which means that one is able to consider two opposing arguments, and understand them to the point that one could articulate the negatives and benefits of each side. That is very much not doublethink.