zebedee;
Are you saying that children should read what they have only been taught to read?
I suspect that you are putting a completely different interpretation on this, the very wording of your question does not at all reflect what I actually said.
I think you are coming from a 'whole word' angle where children 'learn' each individual word. Whereas Synthetic Phonics does not put any emphasis at all on learning whole words.
SP takes a step further back; it teaches children to identify the 44(ish) phonemes of which English words are comprised, at the same time teaching them how each of these phonemes is represented by a letter or group of letters. As the children learn the letter/sound correspondences they learn how to use their knowledge to deconstruct the witten word into its component 'sounds', then how to blend those sounds together to produce a 'spoken' word (aloud or silently). This entirely does away with any need to 'learn words' as, once the child has learned sufficient letter/sound correspondences (about 160 -180 common ones), they are able to work out what the great majority of words 'say'.
In the initial stages, while the child is accumulating the letter/sound knowledge they are given books to read which contain only the correspondences they have learned. This ensures that they are able to practice independently and with confidence, and, that they do not become completely discouraged by encountering words which they have no chance of being able to work out for themselves.
Thus my comment that, if a child who was stuck on the word 'stair' not only didn't know the 'air' grapheme, but also didn't know what phonemes the 't' and the 's'represented, they should not have been given that book to read in the first place. Not because they didn't 'know' the word, but because they had not been given the tools with which to work out what it 'said'.
To me, and I find it really difficult to understand why it is not blindingly obvious to everyone, the greatest strength of SP is that gives a child independence right from the start. Once the first 6 correspondences are mastered (usually s,a,t,p,i,n)there are over 100 words which a child can work out/read completely independently. The number of words which they can read independently increases spectacularly as they learn more correspondences. (It would be very interesting if some geek were to work out how many words each new correspondence adds
)
Whereas with 'look & say' the child's reading vocabulary is restricted to a very few repeated words (someone on another thread recently noted that their dc had brought home a book which only contained the word 'look'
)in the hope that they will 'learn' them, and they have to be told what the words say before they can start to 'learn' them. When they encounter new words they are dependent for a very long time (if not for ever) on someone telling them what the word 'says'.
(The matter of 'meaning' belongs to a different post!)