I can see several advantages: -having a "frozen" dataset, meaning that I can work on the same dataset as my colleague -Having all the topics frozen at the same

I can see several advantages: -having a "frozen" dataset, meaning that I can work on the same dataset as my colleague -Having all the topics frozen at the same date, representing global knowledge at one point. They knew X and Y, but Z was not advanced yet, so they could not do W. It is hard to realized the concomitance of knowledge bumps on the time scale in a continuously changing encyclopedia.