Explanations cannot be read on iPad. Selecting them doesn't make them visible. Please implement that they become visible after a tap!
This question is about spoilers that explain answers to some underhanded questions.
This is an example of a spoiler:
Snape kills Luke Skywalker's father! Also, the Titanic hits the Hindenburg!
Firefox for Android works. If I tap the spoiler, the text appears. If I then tap somewhere else, the text disappears.