Much of it can and has been. Consider the neutrino story . Imagination, intuition, creativity seem to play as much of a role as reason. Mahoney complains that much of the world seen through this Western white male epistemology is contemplative, not giving the knower much of an active role, as if reality existed independently of the knower. Constructivism takes the position that the knower must be recognized as an active participant in the exploration and construction of the reality in which we live.
Reality is reality.
It's out there somewhere. Not what Mahoney says. He is a constructivist and believes that the knower takes an active part in the shaping of reality. This may not include the shaping of atoms. Granted that the atoms may have a structure independent of us that we can discover, as in the neutrino discoveries.