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For all practical purposes, a secure, one-way cryptographic hash is irreversible.

I'm thinking of a number between 1 and 100.

It's bcrypt hash is: '$2b$15$qUxzZ5ZF55lMuqiH9GMjQOHkNyee86qd2Vh2kQyF5P3U6JZJx9AEC'

I bet nobody could ever reverse this secure cryptographic hash to figure out what it could be... ;)

I think you need to address converse the examples in the article in order to assert this.