Word for "philosophical thoughts"?

Example:

What was worse: doubt or the uncomfortable truth? I was delving into this/these boredom-triggered [...] when my phone rang.

I thought of dilemma but I think it's kind of a different thing. More like a problem.

What's a better alternative?

Solution 1:

If you change the word these into this, then I'd recommend using conundrum.

What was worse: doubt or the uncomfortable truth? I was deliving into this boredom-triggered conundrum when my phone rang.

musing Meditative. Thoughtfully abstracted. Source

What was worse: doubt or the uncomfortable truth? I was musing on this when my phone rang.