Deadlock on producing blue science

[Quax]

Hi there, been a long time since I last played Factorio, and now it seems I'm stuck in a deadlock:

I finally need to produce blue science packs. For that, I need red circuits. For them, I need plastic. For that, I need petrroleum gas, which is produced in the refinery. Which needs to be buildt in the assembly machine 3, as it consists of 5 components (steel, gear wheel, brick, circuit, pipe). Now here's the deadlock. To research the assembly machine 3, I need blue science. Bang.

What am I missing?

Please help, thanks.

Cheers,
Peter

[Bilka]

You can just craft the refinery by hand.

[Quax]

Wow .. I really stumbled over the most obvious solution. I forgot that blue science is the one where you CAN'T stay away from manual crafting . I try to craft EVERYTHING in an assembly machine ...

[bripi]

You are forced to hand-assemble your first refinery. You don't have a choice.