Can you use a single ticket more than once on the same journey?
For example, if you get on at Hillhead and your end destination is St. Enoch, could you get off at Cowcaddens then get back on using the same ticket?
On the train it seems you can get off then back on using the same ticket, but obviously with the train ticket you have paid to reach the end destination, while the subway is just a blanket single ticket.