"There is a real problem where as humans we are really only looking for 'alien intelligence' that we can interact with." I don't think so. There could be some

"There is a real problem where as humans we are really only looking for 'alien intelligence' that we can interact with." I don't think so. There could be some intelligent race of fruit loops that communicate with each other by creating waves through the milk in a giant cereal bowl, but eventually if they are really intelligent they will discover radio, and we would detect the signal. But we haven't.