Final answer:
The logical fallacy of choosing between two candidates when five are running is known as a false dichotomy, which limits choices without justification and influences strategic voting behaviors.
Step-by-step explanation:
Being asked to choose between two candidates for president when five are running represents a logical fallacy known as a false dichotomy.
A false dichotomy occurs when an argument presents two options as if they are the only possibilities, despite the existence of one or more other options. For example, framing the choice in a presidential election as an either-or decision between two candidates, out of several, artificially limits the available choices.
This can impact voting behaviors, as seen in systems with a strong winner-take-all component, like in the United States, where voters might discard third-party candidates to avoid the risk of 'wasting' their votes. Such strategic voting often leads to people voting for the 'lesser of two evils' rather than a candidate they wholeheartedly support.