  The first evidence of new strong interactions may be a sufficiently massive
fourth family observed at the LHC. The fourth family masses, of the leptons in
particular, are constrained by the electroweak precision data, and this leads
to signatures at the LHC that may imply early discovery. We study the
implications of this discovery from a bottom-up perspective, where effective
4-fermion operators model the dominant effects of the new dynamics. We identify
simple approximate symmetries of these operators that may be required for
realistic masses of the third and fourth families. The large top mass for
instance is related to the structure of these operators.
