aromatic compounds - What can we say about the dipole moment of terephthalic acid?

The dipole moment of quinol is not zero because it can exist in two different energetically favourable conformations. The weighted average is calculated to arrive a dipole moment of 1.6 D.

According to Wikipedia, the dipole moment of terephthalic acid is zero. But few sources have a different opinion.

Can we say that terephthalic acid can also exist in these two conformations, leading to a high dipole moment?