| ⊦ ¬ datakey(ino, n) ∈ pcache ∧ ino ∈ files ∧ n ∈ files[ino].content → files ⊕ pcache[datakey(ino, n), mkpentry(false, files[ino].content[n])] = files ⊕ pcache |
ino ∈ files, n ∈ files[ino].content ⊦ files ⊕ pcache[datakey(ino, n), mkpentry(false, files[ino].content[n])] = files ⊕ pcache, datakey(ino, n) ∈ pcache