I tend to disagree.. I have done some things which I thought was experimenting with but did not come up with any clear conclusion after the experiment and analysis. On rewriting the thesis it turned out there were a lot more implicit assumptions inside the hypothesis that I was not aware of. I think it was a badly designed experiment and it was rather unproductive in retrospective analysis. I suppose one could argue that it brought to light the implicit assumptions and that was a useful result. Somehow(not sure how or why) I find that a low standard to consider something an experiment.