The phrase "already existent one" is correct and usable in written English.
It can be used to refer to something that already exists or is already present, often in contrast to something new or proposed.
Example: "In our discussion about potential solutions, we must consider the already existent one that has proven effective in the past."
Alternatives: "pre-existing one" or "existing one".
Which makes sense, considering the two formats are already existent on a majority of the pages viewed on Facebook.
In thinking "The existent B is existent", one can apprehend the existence of B, but one cannot grasp the genuine factuality of B's existence.
" This will let you connect your already existent Wordpress account to the app on your Android.
In the first one, measurements were carried out to characterize the available neutron beam at the already existent RA-1 biological irradiation facility.
Ralph Fiennes proving unavailable, Carmen and Rob find a way to make their surprising connection work, eventually creating, with her son and his anorexic daughter, "one of those awkward, reconstructed families that create a new geometry out of everyone's already existent problems".
In the past, many attempts by service providers and intervening non-governmental agencies have one way or the other failed because they allegedly did not involve the local community and already existent local processes in their action plans.
Cases occurring within 1 year from BO diagnosis were considered to be already existent at BO diagnosis date and in relation to the BO diagnostic work-up.
"What we need to do is soak up the excess capacity that's already existent in the world.
Specific characteristics of already existent samples are utilized, a solution set is created, and the optimum solution is selected.
Adam Arvidsson and Nicolai Peitersen, a scholar and an entrepreneur, outline the shape such an economy might take, identifying its origins in innovations already existent in our production, valuation, and distribution systems.
