Haven't seen this mentioned yet, so I'll comment.

Challenge her ideas and values. It's the quickest way. If it sounds bullshit or narcissistic, you got your answer

Make her feel comfortable. Show her that you don't judge girls for being hoes - it's inconsequential, it's a phase, it's the 21st century, whatever. Maybe when you two have had a few and are by yourselves, ask her what was the kinkiest thing she's ever done, or her most taboo fantasy, or whatever. If she feels that she doesn't have to lie, she'll lower her guard.

I’m talking to this girl and she honestly seems LTR material

I asked if she had a hoe phase

You're going about this backwards.

What are some geniune strategies,

You mean, some very basic red pill strategies that are covered in the sidebar? See humansockpuppet's guide to bitch management.

just tell me strategies to find out if she is lying or not.

Sorry to tell you, but nothing short of vetting over a good period of time will come close to telling you the truth. Not even strapping her down to a lie detector would.

Again, your thinking is backwards and you're already sperging out by asking her retarded questions.

I asked if she had a hoe phase

Dumbass.

You are gen Z, so you are probably retarded by default, even without mentioning that you JUST ASKED HER IF SHE HAD A HOE PHASE, like a functional autist that you are.

Look, any girl that has access to the internet or tik-tok/instagram/yt already knows the red pill soundbites as red pill went absolutely mainstream in the last one and a half year. We're talking politics-climate shit mainstream level.

So besides the fact that she 99% knows the terminology and soundbites like "hoe phase", you just told her indirectly what kind of guy you are and what melody does she have to play for you to dance along, if that gets her whatever she wants.

And you already fucked up by asking that autistic question. Even the name of it shows that you judge, to her. So do not expect to be 100% open with you, not even 70%.

If you want a girl to open up about shit like this, you have to give her the vibe that you do not judge, that you are a pornstar basically, used to this kind of shit and that discussions like these mean nothing to you. You know, playing along with the liberal/hedonist mindset.

How can you tell if a girl is faking her innocence?

NOT by asking her what you did

You vet her for 2 years. Most people can't consistently maintain lies for that long. If her story keeps changing then you know she's not being honest.