Is it wrong to cite your own definition of a concept in thesis viva-voce presentation Recently, I defended my PhD thesis in the final viva-voce session. Post the presentation, one of the panel members questioned that I should not have stated my own definition of a particular concept. The panel member suggested that I should have rather given a industry-standard definition for that particular concept.
This makes me think and wonder that Why I should not suggest my own definition of the concept. After all the definition was published by an high impact journal and has been cited many times.  By the way, I understand what they meant. And my PhD supervisor too did not raise this as a concern when I sent them the presentation for checking.
My contention here is, I have worked in this area for several years and I do not get the right to cite my definition for my own viva.
In other countries, the viva-voce is called &quot;defense&quot; for a reason. The onus is on you to defend your use of the definition, in particular, if it deviates from the industry standard.