ok, I'll try again...

techno isn't not really defined by having a predictable structure - endless builds and drops (trance, D&B)

Its not defined by certain sounds - like pianos or ogans in house, arpeggiated synths in trance, reese basslines in D&B

It doesn't have one set style (acid, detroit, schranz, gabber)

So its more flexible than other genres, has less rules or conventions, more space for experimentation, wider use of sounds and greater use technology than other types of dance music.

About the only consistent thing I can find about techno is that its generally built around a 4/4 pattern