The field of virology doesn't draw a line in the sand excluding certain viruses with low transmission rates.
Viruses that are more transmissible simply draw the attention of the field.
Presumably, a scientific study of ideas would observe ideas commonly transmitted in the wild.
>The field of virology doesn't draw a line in the sand excluding certain viruses with low transmission rates. Viruses that are more transmissible simply draw the attention of the field.
The field of meme-ology however does. So there's that.
It's only a property of some ideas. People have self-contained ideas all the time, including ideas they're inclined to absolutely keep to themselves.