Two doctors talk about myths about the brain, and they try to correct it. First they say the myth, and then they talk about it. One of such myth is:
"You can't prevent a stroke."
A: Noooo, that is not true.
B: That is very not true, actually.
The second sentence shows us a different usage of "very". It is used with a meaning "at all", meaning "That is not true at all."
However if we place the "very" in regular usage "That is not very true, actually", it would mean "It is true to some extent", which would be different.
So I wonder if this usage is common amongst native speakers? If yes, then we should be careful where to place the "very" in such negative sentences, should not we?