Cold glass flowing is bunk! The strongest argument against it is tempered glass. Tempered glass is made heating it to the softening point and cooling the surface with air jets. This makes the surface cool and and immobile. The middle region is not quite solid as it has not cooled yet. As the glass in the center cools and shrinks slightly, it pulls the cold surface into intense compression. 1000s of pounds of per square inch, in fact. If the surface of the glass is breached in some way, such as a deep enough scratch, the inner material that is in tension, as it is tries to compress the outer surfaces, rips itself apart violently and sheet of glass “pops” into a bunch of small cubes as the potential energy is released all over the sheet.
Now, if glass flowed at room temperatures, this intense tensile and compressive forces would simply vanish as the glass flowed from the forces seconds after it was made. However, old tempered windows will still break into cubes showing the tempering is still in effect. If you took a tempered sheet of glass and heated it evenly to the softening point, and let it slowly cool (so no new stresses form), it would become non tempered and would shatter like regular glass.
Lori, The key term is melting *point* . Many amorphous solids get softer as as they are heated. There is no specific temperature at which the material suddenly turns liquid as with ice to water.
John