@Serapheid Well my friend, object classes are distributed based on Each SCP’s difficulty to contain.
The box test can be used as an example
If you lock it in a box, leave it alone, and nothing bad will happen, then it's probably
Safe.
If you lock it in a box, leave it alone, and you're not entirely sure what will happen, then it's probably
Euclid.
If you lock it in a box, leave it alone, and it easily escapes, then it's probably
Keter.
If it is the box, then it's probably
Thaumiel.