Quote Originally Posted by Selindrile View Post
I think most people would disagree with you, you could make the argument that trust is "not solo" but by that logic you could say that Beastmasters, Pups and Smns aren't soloing unless they don't have a pet out, by and large when people refer to soloing in this game, they mean, "one player character", and some go further as to call dual boxing and the like soloing because it's controlled by one person, but very few go the other way, and classify trusts or other NPC characters as not solo.

At the end of the day, the meaning of solo in FFXI is up for discussion, but I doubt too many would use it in the way you just did.
Since you can't use trusts in certain BC/instances, solo isn't the same as using a trust IMO.