Stupid Question

[Mordachai]

#Crystal-Infused Plating
tech_crystal_armor_1 = {
    area = engineering
    cost = @tier2cost2
    tier = 2
    prerequisites = { tech_ship_armor_1 }    # crystal armor requires at least basic armor technology first
    category = { materials }
    ai_update_type = military   
    weight = 0
   
    ai_weight = {
        modifier = {
            factor = 1.25
            research_leader = {
                area = engineering
                has_trait = "leader_trait_expertise_materials"
            }
        }
    }
}

Doesn't a factor 1.25 of 0 equal 0?

Or am I misunderstanding something?