"Someone told me...."
"I read somewhere...."
and that deadly one, "Actually....."
Amazing how we use these words to defend what we believe to be true, even in the face of strong, empirical evidence that we are wrong.
This ability has come to the fore in our beliefs about Covid, but I guess it's always been there, obfuscating and colouring our thinking, and letting us confuse theories and opinions as facts.