Both these techniques can be effective as ways to point to the emptiness of 'self'. Then, yes, what can thoughts attach to? Where are they coming from? Is there any truth in them? Very good.If I may I would like to give you some insight into my mind in order to respond to this question:
Last night I was lying in bed on the brink of sleep, fatigued, thoughts flying by, scenarios ensuing, some attachment involved. A painful thought floats by and the response is why the # did that pop up. The counter-thought or mental antidote is. "there is no self here to receive the message". It works the thought floats by.
I have also interpreted from a video on this site that one can see thoughts as like soap bubbles when they appear you can look to see if there is any truth to them and they dissipate or not, however that involves someone looking.
You are talking about mental antidotes. But what about without doing these ways of reflecting? Is it clear that in spite of appearances and thoughts to the contrary there has never been a self? A good way to look is to ask 'is there a self here right now'? Take a look.
Remember, we are not interested in appearances. We are not interested in thoughts ABOUT me. We are interested in really looking, seeing if a 'self' can be sensed, heard, touched, smelled, tasted?
love,
Jon

