Inferring others' behaviors with のことだから
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The pattern Nのことだから knowing NOUN; since it's NOUN can be used when stating or implying that some sort of behavior can be inferred.
Usually the noun will refer to a person known by both the speaker and the listener.
English translations of sentences with Nのことだから will often include the word "knowing", like this:
You and your friend are planning a surprise party for your friend Jung-ah. You're talking about the possibility that she'll figure it out.
You're planning a drinking get-together with your friend. Your friend asks, "Do you think Kaoruko would come if we invited her?"
When you are ending the sentence with Nのことだから, the から part gets dropped:
A novel. A sentence about a missing dog.