# Tag Info

A lay person might think they know what infinity is, but a mathematician will ask you "what kind of infinity are you talking about, and in what context?"

See the question Is Infinity a number and in particular this answer for a good discussion on a number of things that people sometimes mean when they talk about "infinity" in mathematical terms.

Please check the questions What is $\infty$ - 1 and What is $\infty - \infty$ before asking questions about doing arithmetic on infinity.

Questions about fallacies involving infinity are on-topic for this tag.