Earlier quoted context omitted.
Exactly. It's a fallacy when dealing with logical entities, but humans aren't logical entities.
It’s only a fallacy when dealing with logical relations under certainty. Once uncertainty and probability is introduced the slippery slope just is relating Bayes’ Rule in plain English.
Incorrect. Slippery slope is an informal fallacy, which applies to arguments based on evidence not logical relations under certainty. But it is a component of the slippery slope fallacy that the implicit premise (that the precondition that is the subject of the argument is likely to lead to the result that is the endpoint of the slippery slope) is inadequately justified, not merely that a slope from the precondition to the endpoint is presented.