I often come across a certain fallacy when talking to people regarding agreeing with someone about something necessarily means I agree with everything else. Here is one example:
- John is an atheist, therefore he believes that green is a nice color
- John believes that 2 + 2 = 4
- I also believe that 2 + 2 = 4
- Therefore, I agree with John
- As such I also agree that green is a nice color
I agree that the fallacious point here is that the statement number 4 is only valid to the scope of 2 and 3, not generically. However it seems that I come across this fallacy way more often than I would expect, so I guess that this must a common fallacy. One situation that I came across was the following one:
- Vegans believe that they shouldn't eat or drink animal sourced products
- Vegans believe that they should substitute dairy milk with plant milk
- I believe that I should substitute dairy milk with plant milk (because I don't like dairy milk only)
- Therefore I agree with vegans
- Therefore I agree I shouldn't eat or drink animal sourced products (not true from here)
- It follows that I'm a vegan
This was told me by a person who saw me drinking plant based milk and he immediately came to the conclusion that I was vegan. Another one was someone who believed I had religious restrictions to alcohol since I don't drink alcohol (I just don't like to drink alcohol). Also sometimes when I agree with a statement from a politician I'm often labelled a supporter of that politician and agree with everything else this politician's party promotes.
Does anyone know what is this fallacy, if it is named and there are other resources about it? This fallacy is often used against me to label incorrect things about me, so I want to know how to prevent people from doing that to me and to be more precise with my points and avoid misunderstandings.