I don’t trust anyone’s opinion unless it’s based on sound evidence and repeatable results and even then, I’ll only trust the opinions of those who are willing to change their opinion based on new knowledge. So, given that, I’ll trust my young kids opinions on things they have researched and learnt about, or a doctor’s opinion if it’s on something they’re knowledgeable about, and my own in areas where I’m an expert.

How MUCH I trust them is a different thing. If it’s something that doesn’t really affect me if it’s not 100% accurate…meh