Reasons Hero's legacy not canon to GT

[Speedster]

Unless Goku was going back on his words and saying that Goku Jr. is the grandson of Goku's granddaughter's child. Which would be correct also because it would be this:

[=My=]----------[===Granddaughter's==]---------------------------[========Child's=========]------------------------------------------[==============Grandson===============]
Goku > Gohan > Pan(Granddaughter) > Great Granddaughter (this is Goku's granddaughter's child) > Great great Grandaughter > Great Great Great Granddaughter > Goku Jr.(Great Great Great Great Grandson)

No that would be incorrect. Being the grandson of Goku’s great grandchild would result to Goku Jr being the greatx3 grandson of Goku. Anyway the fact of the matter is that there is a contradiction between what Goku says in the special and what is stated at the end of GT. Whether that is an out of universe mistranslation by Funimation or a mistake by Toei OR in-universe Toei intentionally made Goku goofing his genealogical relationship with Goku Jr on top of having him goofing with the maths is another thing. I really don't care though what really is actually the case so that is my final post on this topic. Dragonball GT (and Dragonball in general) has far more severe flaws than this one - this at least has a perfectly reasonable in-universe explanation.

[Hitiro]

Unless Goku was going back on his words and saying that Goku Jr. is the grandson of Goku's granddaughter's child. Which would be correct also because it would be this:

[=My=]----------[===Granddaughter's==]---------------------------[========Child's=========]------------------------------------------[==============Grandson===============]
Goku > Gohan > Pan(Granddaughter) > Great Granddaughter (this is Goku's granddaughter's child) > Great great Grandaughter > Great Great Great Granddaughter > Goku Jr.(Great Great Great Great Grandson)

No that would be incorrect. Being the grandson of Goku’s great grandchild would result to Goku Jr being the greatx3 grandson of Goku. Anyway the fact of the matter is that there is a contradiction between what Goku says in the special and what is stated at the end of GT. Whether that is an out of universe mistranslation by Funimation or a mistake by Toei OR in-universe Toei intentionally made Goku goofing his genealogical relationship with Goku Jr on top of having him goofing with the maths is another thing. I really don't care though what really is actually the case so that is my final post on this topic. Dragonball GT (and Dragonball in general) has far more severe flaws than this one - this at least has a perfectly reasonable in-universe explanation.

Then yeah, he is probably saying that Goku Jr. is his grandson from his granddaughters granddaughters child then. To be fair. I think it is unfair to compare a stories issues when the size is completely different. Because larger stories will have more issues. If it had more issues than Dragon Ball and GT then I would agree with you. Or if you divide the amount of time by the amount of errors and it is less than another story then that is also fine.