I think virtual particles are a different question, as it is at least clear what is being asked (I think they are real, but have seen no convincing arguement on

I think virtual particles are a different question, as it is at least clear what is being asked (I think they are real, but have seen no convincing arguement one way or the other). With wavefunctions, I am not actually clear on what the object "wavefunction" is. If you are asking if I believe the wave exists independent of the particle, then no. But I also do not think it is merely a calculation tool. My view is that it is analogous to "velocity" in classical mechanics. In that it is a property of the object in question. I do not know if that qualifies as "real" or not.