That would be your opinion unless there is a written and sanctioned document outlining the exact requirements for a solo hike.
Okay, so I'll play along. Here are some questions that would need to be answered so people know what the detailed requirements would be.
1. If I hike up a trail in the afternoon that a trail crew had cleared of significant blowdowns in the morning and they left by another side trail so I did not see them or any other hikers throughout the hike, is that not a solo hike since they made it easier for me?
2. Several winters ago I hiked up Liberty and Flume, saw no one all day, and broke trail through 4 to 8 inches of newly fallen snow that was inside the 'trench' that some person or persons had broken out perhaps weeks before my hike. I considered it a solo hike. Would you?
3. If the answer to 2 is Yes, then how much snow needs to fall on a broken out trail in order for it to be deemed as a virgin trail again?
4. If the answer to 2 is No, then the only person who can truly do a solo hike in the winter is the first person to walk through the snow that winter, right?
5. If I hike alone up a summer trail and catch up with a stranger, walk along behind him/her for 100 yards before I take a side trail and I see no other people all day, is that a solo hike?
6. Same question as 5 but I meet a friend, I stop to talk to them and continue walking and talking with them for the 100 yards to the side trail, part ways, and I see no one the rest of the day, is that a solo hike?
7. What exactly do you mean by the 'prestige' of a solo hike? Are there incidents that make one solo hike more prestigous than another?
I have more but I'll let it go at this. At least for now.
JohnL