I am going back to this thread because it occured to me that there is some more evidence that YIJ does not fit in with the picture of Indy's youth painted by the trilogy.
1.'He said you were a bum, the most gifted bum he ever trained' Abner on Indy in the early 20's
Does this really sound like the description of the scruplously honest, heroic, innocent, and very well bred figure that we see in the YIJ series?
2.Indy's coduct in YIJ vs trilogy
In YIJ Indy does not go after the peacock instead taking a moral lesson, while in ToD he works for chinaese gangsters for a diamond.
3. 'It was wrong and you knew it!' Marion on Indy and their affair
Does YIJ seem like the sort of person who could have done anything so bad as to incite hatred from Marion after a decade and alienate Abner...
4. In LC Indy aged 13 was living in a normal looking abode in Utah while YIJ makes YIJ out to have had a life in very rich surroundings which just doesnt seem consistent with the type of character we see in the trilogy...
5. 'If you had ever been an ordinary average father like the other guys dads...'
LC sets out that Indy had a childhood in a normal setting while the series YIJ seems to suggest that he spent most of it going round the world.
6. 'You left just as you were becoming interesting'
In the seires Indy leaves and goes off to fight in WWI, wouldn't this be something worthy of comment in Henry and Indy's conversation rather than simply leaving.