Trinity is false.

If we take the route of analogy to discuss the nature of Christ.

Lets say the nature is compared to "geometrical shapes"

Lets say the divine nature is compared to "rectangle"

Lets say the human nature is compared to "triangle".

Saying Christ in one period was fully man and fully god is like saying a triangle can be a rectangle.

Well then u'd say why do you suppose man and God are both mutually exclusive elements in the realm of nature of being like the rectangle and triangle are mutually exclusive in the realm of geometrical shapes, to that i'd say the attributes of a God "All knowing , All powerful " ,contrdict the attributes of Man (limited knowledge, limited other aspects, and these attributes belong to the person not the nature (we cannot say my human nature knows or doesn't know we say I as a person have the knowledge, knowledge of humanity is a different subject entirely...)

Well then you'd say you are assuming God cannot make a "reality' where he is Both and limits his knowledge; to that i'd say the only way to take this as a given is to do circular reasoning with the belief of an exception where a creation that is both man and god at the same time exists and with ignoring the fact that no entity can be both all knowing and with limited knowledge at the same time .

One way some people use to disprove the geometrical argument is to say a rectangel can have a triangle in it but then the triangle is still not the rectangle but in fact in logical terms the triangle is included within (which differs from being the two at the same time ) and the same refutation can be used against putting the rectangle beside the triangle , they are a new shape and not the same thing, different entities with different attributes cannot be the same .

That for me shows Jesus cannot be both fully man or fully God , the only logical answer to me is God is one in nature , essence and person.