Since people were already accustomed to fairly uniform sheet glass by that time, it's no surprise that the ancient hand-blown sheets raised some eyebrows, and possibly, the faulty conjecture. The truth is, glass exhibits characteristics of each. But science doesn't look to Webster to draw their distinctions. Science-types will tell you that a material is a solid when its molecules are motionless and lined up in flawless geometric fashion, in perfect little rows and columns, like thousands of tiny soldiers at attention. A liquid, on the other hand, is quite the opposite.
Liquid molecules are in a constant state of movement and entirely random in their configuration.
Many materials, like water and iron, are common in both liquid and solid states. At any given moment, their state depends on their temperature. Water molecules are disorderly and mobile only to a point, which is thirty-two degrees Fahrenheit. The liquid has become a solid. Only when every molecule has taken its place in the lattice and come to a standstill will the temperature continue its decline.