I noticed that when you use certain words that are commonly used in coding like true or false then Minecraft reads that word in the lore as code and that word is ignored.
I'm sure there are other words that this applies to but as of now these are the only 2 I could find. I'm not a coder so if you know java expermient I will update this with my findings.
/give writertyler minecraft:apple 1 1 {display:{Name: "word", Lore: [yes, true, no, false, see it doesn't work]}}
Known words:
true
false
Update: While the word itself is ignored the set of letters is not ignored so truely will show up or falsely.