I see this shailo often in cheap stam:
Very often there will be no bottom right corner of the rosh. Sometimes it's just extends out to the right on a slight angle from the regel.
I find that a shailos tinok is not always apt because child will be deceived by the tagin and will not distinguish between an angular blita and a proper rosh.
How does the Olam deal with this shailo? And can a tinok relied upon here?