How to Validate a User Persona

Get the most information you can so you can properly validate your idea. While not bothering the users, you need them to go lighting fast. There are great tools that leverage aggregated features from the Internet and from the user behavior for example. If we think that we need to know how many dogs a person have when you're building a software as a service to, to give you video recommendations. Well, that's your current hypothesis. How are you going to validate it? And if you need to ask that as a question and that becomes a threshold a barrier or drop off then you're already getting the answer.