How would you know? We havent even penetrated into the earth hardly at all. And seismic waves indicate less dense material deeper. In fact three oceans worth of water near the core......
Sure, since you are too lazy to do your own research and instead prefer to cast aspersions of validity....
In fact the heat combined with the reduced porosity made drilling virtually impossible as the rock acted more like a plastic than a pressured heated rock would.
Kola Superdeep Borehole
"Also unexpected was a decrease in rock density after the first 14,800 feet. Beyond this point the rock had greater porosity and permeability which, paired with the high temperatures, caused the rock to behave more like a plastic than a solid and made drilling near impossible."
Kola Superdeep Borehole Facts
"Drilling at such low depths at the Kola Superdeep Borehole meant drilling in extremely high temperatures. The rock density was also more like plastic than rock and it also contributed to the difficulty in drilling and eventually having to stop."
We won't mention that it falsified their beliefs of the mantle and that large amounts of unexpected water were found, as well as other gasses like hydrogen.....
But that's the problem with using incorrect beliefs in geology, you find water where your beliefs held you never would.....
So basically three major predictions of geology were falsified, but you certainly won't hear them tell it.....