>>36 It is 2 hours of inactivity. Not two hours since thread creation. The timer begins counting from the last time someone makes a post to the thread.
Example: 10:00am -> New thread creation 11:59am -> First reply to thread 12:00pm -> Thread does not drop 02:01pm -> Thread drops
Example 2: 10:00am -> New thread creation ... Nobody makes a reply to the thread ... 12:01pm -> Thread drops
Example 3 10:00am -> New thread creation ... More than twenty replies to the thread ... 12:01pm -> Thread does not drop, because there have been more than 20 replies
Example 4 10:00am -> New thread creation 11:59am -> First thread reply 12:00pm -> Thread does not drop 01:59pm -> Second thread reply 02:00pm -> Thread does not drop ... No more thread replies ... 04:01pm -> Thread drops