@Esteban
And your example is not only wrong (due to mistaking assumptions, for canon), as mentioned by Background Pony #3A99, your whole argument is based on false assumptions - the two episodes, had the same, primary/1st place level of canon, and as a rule, all secondary canon (like books or comics), are overriden and rendered noncanon by primary/1st place canon/animated works.

Like (as mentioned bwllow) with the Fiendship is Magic comic prequell about Sirens and Star Swirl, being overriden by telling of the Dazzlings sending to the human world by Star Swirl in season 7. Or how Moondancer was a very different, and different aged character, than shown in the cartoon, i the comics, and cartoon Moondancer is canon.

The only difference is that Twilight Sparkle’s Science Fair Sparks writes itself in the first place with stary that is contradicted by prmary canon.

I don’t want to go into arguable ad hominem, as Background Pony #3A99 suggested you did, but if anything, you come of as overly defensive (for some reason), of this book’s canonicity.

I apolognize if it’s not the case, but as of now, you essentially argue this book should be an exception to rules, that pretty much governed all other works, and their canonicity….