Yes, the model one has and the terms one uses probably vary from person to person. However, a meaningful exchange of ideas can occur anyway, if we are prepared

Yes, the model one has and the terms one uses probably vary from person to person. However, a meaningful exchange of ideas can occur anyway, if we are prepared to hone in on definitions of words, and correct the difference in personal meanings. This requires patience and good will. It is the opposite to making Barnum statements, such you get in politics like: 'this is a good thing' allowing each individual to mislead themselves with their own definition of 'good'. Imo, truth with a capital T does exist - it is that which has happened. This is valid if we are not living in a simulation... which I personally don't think we are in. However, we only have our personal view on truth/reality. Pretending we can have anything more (via shared models such as religion or science) is flawed. Recognising the (very limited!) boundaries of what we know, and knowing the difference between belief and knowledge is essential.