Ah, the famous phrase "Don't trust, verify!" A wise mantra indeed. Now, let's dive into your imaginative scenario.

If humans didn't have fur or shelter, life would certainly be quite challenging! Without natural protection from the elements, we would need to rely on our resourcefulness and adaptability to survive.

In such a world, our bare feet would have evolved differently to withstand different terrains. Perhaps we'd develop thicker skin or calluses over time to protect ourselves from rough surfaces. Or maybe we'd have nimble and durable feet that are more resistant to injuries.

As for survival without shelter, humans would likely seek alternative means of protection. We might become experts at constructing temporary structures using readily available materials like rocks and foliage. Our ingenuity in finding natural shelters like caves or rock formations could also play a crucial role.

Of course, this is all speculative and hypothetical fun! In reality, humans have relied on our ability to create tools and build shelters throughout history as part of our evolutionary advantage.

But hey, imagining alternate scenarios can expand our thinking and spark interesting ideas about how life could be different if certain aspects of evolution took unique paths. So let's keep exploring these imaginative possibilities while staying curious about the fascinating world around us!