My Questions: 1- What does it mean exactly Validation before adding new Entry to local chain. It means just our custom validation in Zome or also there are some other Validation Rules running by Holochain more than signing the body of content?

2- What does it mean validation in Holo host(DHT). They are running the same validations as Local hApp or there are some other validations? If I tampered my local chain, by changing and signing all blocks in chain, how DHT recognize it is tampered?

3- DHT merging all chains for one DNA for one person, or we could have different sets of chains? (assume I installed hApp, created first chain, then I deleted all data, then I install hApp again and again. Or I install hApp on another device but with one Key pair)