Is the suggestion that aliens make crop circles ruled out because it seems dumb, or because extensive investigation has ruled it out as a possibility -- by refuting something related to the claim?
All of the above
Its dumb the only way aliens can communicate is by drawing stuff in our crops common thats pure bullshit, id sooner believe that you tube freak who communicates with aliens and uses you tube to communicate with the president.
It has not been ruled out 100% but so ha sent the theory that magic leprechauns cause gravity.
Just about everything that was claimed by crop circle proponents has been refuted, things like you cant make crop circles by hand whiteout looking from above, the crop stems exploded no they dindt the formations usually shown are made when the crop tries to grow up again t words the sun.... .