"Intuition is the ability to acquire knowledge, without recourse to conscious reasoning or needing an explanation" per wiki The convention is the precise rule that _ is italics, so no, you aquire no knowledge, you need to already possess that knowledge and remember that precise rule.

On the other hand, if you know that _ is __underline__, - is --strikethrough--, then you can acquire knowledge (guess) that / is /italics/ because the principle is the same - formatting text follows symbol's shape (though it's not a perfect mach since / transforms text, not adds new symbols unlike _ or - ). But that's still intuition (* for bold would not fit here)

The other bad analogies don't help resolve it, so best stick to the topic