Bograt research claim: b06 vs b07 vs b13 wording differs on whether Bograts may be made-up

x_p5_216 conflict

b06 and b13 state only that no photo has been taken and no research done on Bograts, while b07 adds the further suggestion that Bograts may perhaps be made-up and may not even exist.

books Book 6 Book 7 Book 13

subjects Bograt - f_b06_137 - f_b07_099 - f_b13_167

Evidence

b06: no photo, no research - stops there	no photo has ever been taken of one, and no proper research has even been done on them	b06:c99:p269
b07: adds possibility they are made-up	In fact, no photo has ever been taken of one, and no proper research has even been done on them, and come to think of it, nobody actually seems to know anything about them at all. Which makes us wonder whether they are perhaps made-up, and don't even exist?	b07:c99:p247
b13: no photo, no research - stops there	They aren't actually dangerous, just disgusting... Luckily, these dreadful creatures are extremely rare. In fact, no photo has ever been taken of one, and no proper research has even been done about them	b13:c99:p405

citations b06:c99:p269 b07:c99:p247 b13:c99:p405

extraction note b07's glossary entry extends the Bograt entry with a speculation that they may be made-up, which is not present in b06 or b13 glossary entries; this is a substantive content difference, not merely a phrasing variation.