"I don't feel he's gone yet - I still feel he'll be back soon," she tells us. "In my mind, he's in his school uniform. He'll return, swinging his bag."
Instead, it focuses on explicit boundaries, predictable behavior,
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The critical thing to understand is namespaces are visibility walls, not security boundaries. They prevent a process from seeing things outside its namespace. They do not prevent a process from exploiting the kernel that implements the namespace. The process still makes syscalls to the same host kernel. If there is a bug in the kernel’s handling of any syscall, the namespace boundary does not help.