A young boy of trying to fix his blue bike while an adult looks on .
It is certain that a young boy with a red shirt is trying to fix his blue bike while an adult looks on .
There is almost no chance that a young boy with a red shirt is trying to fix his blue bike while an adult looks on .
It is certain that a young boy with a red shirt is trying to fix his blue bike while an adult looks on .
A young boy with a red shirt is trying to fix his blue bike while an adult looks on .