In the lead-up to COP21, a hundred French and international personalities are signing an appeal on Mediapart, entitled : “Let’s leave the fossil fuels in the ground. That’s how to put an end to climate crimes”. And we, simple citizens, are invited to sign too. One would like to be able to sign, but alas, the text is not suitable : not because of what it says, which is generally true, but because of what it doesn’t say and which immediately casts great doubt on the rest. For to say half a truth and omit the other half is not truth-telling.