If you place an old hollow-core door out on the sidewalk, with a “Free Hollow-Core Door” sign on it, then every pedestrian that passes and reads the sign will gently knock on the door.
ExTechOps
Experimental Technical Operations
If you place an old hollow-core door out on the sidewalk, with a “Free Hollow-Core Door” sign on it, then every pedestrian that passes and reads the sign will gently knock on the door.
But did you test the Solid Core Door Hypothesis?
Well, there was a solid core door, but it was taken so quickly that there was no chance to collect any data.