What words did I add?
And to merely read the parable as "The seed on the rock believe-period" is exactly my point. It ignores the rest of Jesus' illustrations whereby He explicitly says;
Matthew 13:23 But what was sown on the good soil—this is the one who hears the word and understands it, who indeed bears fruit and produces, this one a hundred times as much, and this one sixty, and this one thirty.”
Not to mention that you said; "The seed on the rock believe"???
It is important to understand that "the seed" is the word about the kingdom, not the rock (men). Your statement has the seed (the word) believing something, not the man. If you misunderstand this, you misunderstand the parable.
An additional distinction between the good soil and the other three 'soils' is that
the good soil—this is the one who hears the word and understands it ...
Matthew 13:14-15, 19a and with reference to them the prophecy of Isaiah is fulfilled that says, “You will listen carefully and will never understand, and you will look closely and will never perceive. For the heart of this people has become dull, and with their ears they hear with difficulty, and they have shut their eyes, so that they would not see with their eyes and hear with their ears and understand with their heart and turn, and I would heal them.”
...
When anyone hears the word about the kingdom and does not understand it, the evil one comes and snatches away what was sown in his heart.
If the rock would have understood it and had the Root in himself, God would have healed him.
You add soil depth and a root to Jesus' interpretation of this rock example when Jesus specifically says the rock where the seed sprang up (not down) had neither;
Matthew 13:5 And other seed fell on the rocky ground, where it did not have much soil, and it sprang up at once because it did not have any depth of soil.
Matthew 13:21 But he does not have a root in himself, but lasts only a little while, and when affliction or persecution happens because of the word, immediately he falls away.
Jesus says the rock "does not have a root in himself", yet you say "the depth of the root was not much at all". Only one of you is correct. And, like I said (without adding to the passage), there was one example who understood the word about the kingdom.