Does anything block telepathy or blind(sense / sight)?

[Uafluozhaheed]

I've been puzzling, what, if anything, blocks telepathy or blind(sense/sight)? Thickness of metal? Lead?

[Xenocrat]

There have never been any rules on this in PF or SF. Some PF1 APs has scenarios that assumed telepathy went through stone dungeon walls just fine.

[Metaphysician]

Presumably, what blocks telepathy is "Any effect that declares itself to block telepathy". Just because there isn't a particular spell or item in one of the books, does not mean such cannot or does not exist in the setting.

[Uetur]

GM discretion question. For instance I generally say you need LOS to use telepathy/blind sense, but Fog doesn't usually block this so it is like a specialized LOS. I tend to treat telepathy like noise meaning if you can hear someone through a wall you could use telepathy through the same wall and vice versa.

[BigNorseWolf]

TInfoil hats

[Azelator Ereus]

There is a spell for this in the COM. Mental Silence.

Certain variants of Lashunta get it as a racial feature.

Wish it was also a Mystic spell.