Unless the question is entirely opinion-oriented, my sources come from my education (university degree, professional certifications), my experience (70 years), my training in various fields, skills developed over time(cooking, gardening, etc) , and sometimes information I have researched on the internet. I have lived a life of various experiences, some off the beaten path, and a life of continuous learning.
But you have to be very discriminating about internet information ... a lot of it is wrong, so you have to know how to evaluate the credibility of your "source".
If the question is just about an opinion, then my opinion is often based on my knowledge and experience .. but sometimes it is based merely on subconscious emotional preference. Opinions are preference ... not fact.
· 3 months ago