The question is simple though, how do you know that they are right. If the empath tells you something they have 50% of having it right and 50% of having it wrong. 100% of people calling psychics/empaths won't call when everything is going well, so for them, it's very easy to guess things. Just saying. And I'm sorry but nothing guarantees you that they are right especially when it comes to "what the poi thinks feels etc"... that's just BS. Like come on, how on earth would they know from a phone call or a chat lol.
Sure, and I gave you an answer. Honestly your critique could be made about any psychic reader, so I'm not sure where you're going with this.
You asked about my standard. I gave you an answer. You're free to not believe a psychic is able to know what someone thinks or feels, but then if that's the case, why are you here? I never said anything about anyone being able to guarantee anything, by the way. It's all a calculated risk judgment.
In my case, when I'm talking about speaking with an empath for current thoughts and feelings, I judge whether to trust them or not based on how many not-easy-to-guess things about personalities, etc., that they get right about the people involved. I'm under no illusions that this gives me a "guarantee" of anything. But you asked, and that's my answer.