That's exactly what i do. When I see something and deem it important for me (i don't care to check random memes or cat pictures because it's not relevant if the images exist in real life), i try to find other sources to verify the content. I also realize that even if i found supporting evidence, it's still information from the internet and therefor in general not trustworthy - just like any unsigned message has no inherent authenticity.

Thank you for your ancient wisdom.