how compiler implicitly makes reference and dereferences receiver argument for method call expression and how this influences interface satisfaction [golang]

main.go

// https://play.golang.org/p/Nolp4FTyp9I
package main

import "fmt"

type T struct {}

func (*T) String() string { // receiver parameter has type *T
	return ""
}

type V struct {}

func (V) String() string { // receiver parameter has type V
	return ""
}

func main() {
	//var _ = T{}.String() 
		// cannot call pointer method on T literal \n cannot take the address of T literal
	//var s *T ; var _ = s.String() // ok
		// receiver argument has type *T, receiver parameter has type *T
	//var s T ; var _ = s.String() // ok
		// receiver argument has type  T, receiver parameter has type *T
        	// compiler implicitly takes the address of the variable: (&s).String()

	//var s *T; var _ fmt.Stringer = &s ; var _ = s.String() 
		// cannot use &s (type **T) as type fmt.Stringer in assignment: **T does not implement fmt.Stringer (missing String method)
	//var s  T; var _ fmt.Stringer = &s ; var _ = s.String() // ok 1
	//var s *T; var _ fmt.Stringer =  s ; var _ = s.String() // ok 2 - the same as ok 1 above
	//var s  T; var _ fmt.Stringer =  s ; var _ = s.String() 
		// cannot use s (type T) as type fmt.Stringer in assignment: T does not implement fmt.Stringer (String method has pointer receiver)
    
    	//var _ = V{}.String()                // ok
	//var v *V = &V{}; var _ = v.String() // ok
		// receiver argument has type *V, receiver parameter has type V
		// compiler implicitly dereferences the receiver: (*v).String()
		// var v *V = nil;  var _ = v.String() // panic: runtime error: invalid memory address or nil pointer dereference
		// var v *V;        var _ = v.String() // panic: runtime error: invalid memory address or nil pointer dereference
	//var v  V;        var _ = v.String() // ok 
	
	//var v *V; var _ fmt.Stringer = &v ; var _ = v.String() 
		// cannot use &v (type **V) as type fmt.Stringer in assignment: **V does not implement fmt.Stringer (missing String method)
	//var v  V; var _ fmt.Stringer = &v ; var _ = v.String() 	// ok 1
	//var v *V = &V{}; var _ fmt.Stringer = v ; var _ = v.String() 	// ok 2 - the same as ok 1 above
		// var v *V; var _ fmt.Stringer =  v ; var _ = v.String() // panic: runtime error: invalid memory address or nil pointer dereference
	//var v  V; var _ fmt.Stringer =  v ; var _ = v.String() 	// ok 3
		// compiler implicitly takes the address of the variable (&v), as fmt.Stringer's String method has pointer receiver
}