I consider myself an expert on all things VFF, so let me try to explain what I believe is really going on. She calls herself Vision From Feeling for a reason. Everything she does is based on a feeling. It's normal for people to "feel" that something is true. For example, if you see a kid fall down, you "feel" like he is pain. If you see someone jump suddenly, you "feel" like they are startled.
VFF takes this much further than most people. Take her tasting claims. When her boyfriend eats some chocolate ice cream, she "feels" that he is tasting chocolate and feeling cold. Through her imagination she makes herself taste the chocolate and sense the cold. Thus she concludes that she can taste and feel what he does.
When it comes to kidneys, she just imagines that she senses kidneys. In her imagination she conjures up imagery of what it looks like. If she believes he has two kidneys, she imagines two kidneys. Unfortunately, she is unable to separate reality from fantasy. She
really does believe she is seeing inside the body.
Think about it. All of her inconsistencies could be explained by this. In fact, all of her claims can be explained this way. Read Desertgal's excellent essay about Anita's
revolutionary war ghosts. What Anita "saw" was not based on reality but on popular fiction. Her imagination drew on what she knew.
When Anita tried to "see through" a sweater, she figured it would make her confused, so that's what happened. When she tried to see through a screen, it took longer because that's what she expected. I don't think she's lying - I think she cannot separate reality from fantasy.
Look at the other "tests" she has taken. She made all sorts of readings that were wrong, such as with F-A-C-T members and the photos. She saw whatever her imagination conjured up. It's not that her "ability" didn't work - it worked perfectly as far as she was concerned because she still created an image in her mind.
What about all those tests with the cups, clenched fists, and hands in buckets of ice? She
felt in her mind that she knew, so she conjured up an image. She was wrong more often than she was right, but she doesn't acknowledge that this indicates that what she "sees" is not real. As long as she gets a Vision From Feeling, everything is working just fine. In her mind she's just not getting the right data.
If you examine her reasoning closely in regards to the kidney test, you'll see that it's all just her imagination at work. What we're fighting against here is her
irrational belief in her imagination. If you look at it from her perspective, it all makes sense: If she sees a vision, it's working. If the vision is wrong, it's because she's not getting the right data for some unknown reason. If she sees nothing, then something is blocking the data.
Under these conditions no test will ever be created.