A false dichotomy is typically used in an argument to force your opponent into an extreme position -- by making the assumption that there are only two positions. Examples: "If you want better public schools, you have to raise taxes.
What is a false dichotomy argument?
False Dichotomy / Black & White Thinking. Description: The argument tries to force a conclusion by offering (or implying) an incomplete list of alternatives. Typically only two options are considered, while in fact a number of additional options are available.
What is false dichotomy?
: a branching in which the main axis appears to divide dichotomously at the apex but is in reality suppressed, the growth being continued by lateral branches (as in the dichasium)