Comment Re:How Many Factors? (Score 2) 63
"Multi-factor authentication (also Two-factor authentication, TFA, T-FA or 2FA) is an approach to authentication which requires the presentation of two or more of the three authentication factors: a knowledge factor ("something the user knows"), a possession factor ("something the user has"), and an inherence factor ("something the user is")." Wikipeda
While a username and password are two "things," as you wrote yourself they are both things that you know so they only involve one authentication factor. So even if you required 3 passwords per login, that's still only single-factor authentication.
For the most common 2-factor authentication in place today (e.g. if you enable for Gmail) the authenticating entity sends a code to your device in order to tie this to something that you have (your phone) and thereby introduce the possession factor.