The simple answer is that you cannot know.
Unless you know any of this persons ancestors who are deceased - you can look for them and (if they do exist) track back to the current generation and try and determine how likely it is that their profile is already created or not.
If there are no ancestors tracking back to the current living generation, then the chances are probably good that he does not have a profile since there is no current connection. But then you will have to find those ancestors and add them to the tree ASAP.
If there are already ancestors on Wikitree that track back to this persons family - his parents and grandparents - then the chances are probably high that he does already have a profile, so you dont need to make one.
I would say that since you already have 2 unlisted profiles popping up just under your persons name, you would be safer to NOT make a new profile.