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→The purpose of an Example Tree
And, because many of the features of Gramps cannot be explored until the Tree is populated with People, Families, Events, Places, Sources, Media and other types of data; importing the example data creates a playground for exploring Gramps.
Further, most of the examples, [[:Category:How_do_I...|"How do I..." tutorials]] and screen-capture [[Special:ListFiles|illustrations (aka figures)]] in this wiki are based on this example data freshly imported into a newly created (empty) tree. So, by using this data when following instructions on a new technique, you should see the same results. This eliminates the ambiguity and wonder if a different result was because you didn't correctly apply the technique or your data had a critical difference. That lets you focus appropriately: on improving your technique or repairing your data. Such a tree can be considered to be 'expendable.' If you accidentally mangle the tree then simply [[Gramps_{{man version}}_Wiki_Manual_-_Manage_Family_Trees#Deleting_a_Family_Tree|discard the Tree]], create a [[Gramps_{{man version}}_Wiki_Manual_-_Manage_Family_Trees#Starting_a_new_Family_Tree|new Tree]] and [[Gramps_{{man version}}_Wiki_Manual_-_Manage_Family_Trees#Importing_data|import]] the example family tree data again.
The example is also used to provide a known, stable and predictable environment for testing. Many conditions cannot be recreated without tree data. Using this tree (as a common frame of reference) eliminates the extra complexity of [[How_to_create_a_good_bug_report#Creating_a_test_database|describing how to recreate the data]] before [[How_to_create_a_good_bug_report#Recording_the_steps_that_reproduce_the_bug|describing the issue]].