If you're doing a question and you make one little stupid mistake somewhere in the middle or beginning (for example, I forgot the + c integration constant in the easy part of the question, and since it was a logarithm it ended up being crucial to the answer), but you still do the next bit with correct logic (so if you hadn't made the mistake you would be right), how many marks do you lose. Would you even get any method marks at all? I've just done 4 step questions and 3 of those I did something totally retarded, like forgetting a term, or not seeing the - sign, forgetting to square something at the start etc...