Knowing that a tidal wave is headed your way when you've got safe ground that's reachable, is actionable. You can take action to change the outcome.
Knowing that, say, that within the next century the sun would go nova, or a local star would go supernova, for all practical intents, is not actionable in any manner that action could be taken which would preserve civilization / the human species.
I know what the word actionable means. I don't know what he is asking about. Is my suggestion to read the book actionable? Yes, I think so. Is the info in the book actionable? Yes, I think so, on several fronts. But I don't know what action he wants me talking to him about.
