Minimal evidence tweets?

A quick thought related to the recent attention paid to evidence in education e.g. ResearchED 2013. What would constitute the minimum evidence for you to consider tweeting/linking to an intervention claiming to improve or beat a traditional one?

How about this link titled Artificially Intelligent Textbook Helps Students Learn, Boosts Test Scores? Fairly threadbare on relevant info no? What about this New Scientist link to the same story? The intelligent textbook that helps students learn. More info on the treatment and control groups yet no info on say statistical significance, if groups randomly assigned or how blind the study was?

Then what do we find when we get to the company website January 2012 evaluation – <<result was not statistically significant>>. :/

What for you would be a minimal evidence tweet?