The number 4 is Even

First off I would like to address my opponents faulty syllogism mainly his 2nd premise that there must exist objects which the sentence is describing this is a straight toward claim about the nature of a sentence that objects must exist for the sentence to be true that there no exceptions about the nature of a sentence so there must always exist objects which the sentence is describing otherwise The sentence is not true. So the sentence blue is pretty is not truewhile some might think it is and others might think blue is not pretty because of the nature of the sentence and what it claims that blue a frequency of light is pretty according to my opponent the subjective thoughts of everybody is wrong thoughts that blue is pretty are incorrect however I say that blue is pretty is correct that I do BELIEVE that blue is pretty according to me therefore his conclusions fail. Now his conclusion states their must be mathematical objects for 4=even to be true however this is false no mathematical objects NEED to exist for four is even to be true. Consider the word IS the word is make the equation that four is even or blue is pretty while people might not believe these statements to be true however they do not need to I believe that blue is pretty and that 4 is even is true however I have more belief to say that four is even because of mathematical evidence like 2*2=4 or 4/2=2 making it a fact and thus making me believe it to be true. My opponent then makes a claim that average objects do not exist without any logic or evidence or reasoning as to why abstract objects are non existent like blue its absract we see it everyday am I to believe that blue is not blue simply because we cannot hold it or taste it or smell it am I to believe that people do not have a brain simply because I cannot see it. Am I to believe that the hyperbolic plain doesn't exist because I cannot see it or that gravity is not holding me down it's there it keeps the planets in orbit I cannot hold gravity or see gravity nor smell it or taste it when having sex does gravity not keep me on top of her are you claiming that gravity does not exist it is an abstract object without gravity we could not be able to have comfortable sex. We know that air exsists because we see the trees moving we know that gravity exists because it keeps the planets and us in orbit And for the record Santa can have blue eyes blue is an adjective describing the eyes of Santa which are the object 4 is even is true because engineers or physicists would not be able to create dams or calculate the rate at what dare devil would have to go to jump the grand canyon. We know that 4 is even is true because it indicates a sort of law about the number 4 if 4 is even then it is not odd or a prime number it can be divided by two and is a multiple of two if I was a midget that was 4 feet tall that lived in different world where people could only bend halfway and jump two feet and a tsunami was coming and I had to duck under a wall with an opening that was two feet high then jump on to higher ground that was two feet high as well this would all be possible since 4=even is true I await my opponents response And once more thank you for this debate