Help me in a programme!

[sealrochinha]

Hi pll!

I start today learn prolog, and I need your help.

I have this:
"There are three types of emissions: alpha, beta and gamma."
"If there is an alpha and beta emissions, then a proton was detected."
"If there is an emission gamma, then a proton was detected."

I have to translate this for prolog.

I tried this, but it´s wrong:

emission(alfa).
emission(beta).
emission(gama).
detected(X) :- emission(alfa), emission(beta).
detected(X) :- emission(gama).


Sorry for my bad english.

 

[joel76]

You were nearly at the solution :

emission(alfa).
emission(beta).
emission(gama).
detected(proton) :- emission(alfa), emission(beta).
detected(proton) :- emission(gama).

You can write too :

emission(alfa).
emission(beta).
emission(gama).
detected(X) :- 
    % first case
    emission(alfa), emission(beta) ;
    % second case
    emission(gama).

Note that () are not necessary to enclose first case.