So the UK government is trying to get more control by improving the definition of extremism.
I would like to point out that Science has had a lot of experience of formulating, testing and changing definitions where necessary to delve further into the depths of knowledge and behavior. Like all scientific investigations the processes are a mixture of the 2 S's - Systematic and Serendipity [the luck of chaos]
Here are a few tips
1.Systematic is about trying methods of other people . Unfortunately here are far too many definitions about the same thing and a lot need culling.
2.Increasing your chances on Serendipity would mean asking many many more people. I hope they (the UK government) consult much wider than the cabinet
3. Definitions are a big help to "free speech"
4.Don't trust just one definition [ Say your favorite dictionary] Keep searching for the widest truth.]/Keep searching -it helps negotiation.
5. If you do not sort out definitions before you start a discussion , you risk wasting an extremely large amount of time.
6. If you want to sort out which is the best religion or belief make sure the ' Elders ' of that religion or belief sort out their ' Tenants of belief '{ core principles of a religion} to eliminate unnecessary ones e.g hair coverings for females in Islam.
7. People can fight for centuries over the importance of ONE word whereas a compromise between two words wound have solved the problem instantly.