TypeScript any problem

test.ts

interface Test {
    done: boolean,
    name: string,
}

function fn(input: Test) {
    console.log(input.name)
}

let param1 : Test = {"done": true, "name": "Billie"}
let param2 = "Damon"
let param3 = {"done": true, "fame": 42}
let param4 : any = {"done": true, "fame" : 42}

fn(param1)
fn(param2)
fn(param3)
fn(param4)