if u have not researched Hybrid Theory Dynamics and other people that have have madee discoveries can u still use the discovery?

no, you need hybrid theory dynamics researched in order to access the lab.

You need the Hybrid Theory Dynamics researched to "Visit the Theory" Lab, You can't attempt Breakthroughs are execute any designs unless you got it researched.

so u cant even use any of the discoveries unles u have that researched?

that is correct.