Sony AIBO Life2 User Manual page 80

If you cannot register a name
If you are to register a name that is the same as or similar to another word or action
name AIBO already knows, or if AIBO cannot hear you due to noise, AIBO lets
you know with shaking its head that it cannot register the name you said. If you
failed to register a name three times, AIBO lowers its head to show you its
disappointment, and then finishes the current training.
To name the action registered during action registration (see page 72)
Say to AIBO "Action number xx" at Step 3 (on page 78). When AIBO shows the
corresponding action, proceed to Step 4.
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